Your Inner Voice Quotes & Sayings

Your inner voice is the voice of truth within your heart. — Cheryl Hamada

Your mind knows only some things. Your inner voice, your instinct, knows everything. If you listen to what you know instinctively, it will always lead you down the right path. — Henry Winkler

A hint of red there and a dose of heat to sear the skin - mmm, barbecue. Not funny, you sick bastard. As Wes rebuked his inner gator, he slapped himself, only to hear a voice he never thought to hear again after last night. "You're slapping the wrong part of your body. Why don't you stand up and I'll help you get the right spot?" Melanie. What is she doing here? — Eve Langlais

If your inner voice is telling you that you can't paint, by all means, hurry up and paint and silence the voice. — Vincent Van Gogh

Always listen to your inner voice, your instincts — Arnold Schwarzenegger

The ego constantly competes with the spirit for control over your inner voice. — Darren Johnson

Years ago I read that grief is the place where love and pain converge.
For a long time they stood there and simply clung to each other. They didn't feel the need to kiss, and she believed that was because what they shared transcended the physical. This understanding-that they'd both lost what they'd treasured most-brought them together in a more profound way than mere attraction.
But I don't know what my instinct's saying, she muttered. Yes, you do. Just relax, sit back and listen to your inner voice. — Debbie Macomber

Do you really want to be converted? Are you willing to be transformed? Or do you keep clutching your old ways of life with one hand while with the other you beg people to for help you change?
Conversion is certainly not something you can bring about yourself. It is not a question of willpower. You have to trust the inner voice that shows the way. You know that inner voice. You turn to it often. But after you have heard with clarity what you are asked to do, you start raising questions, fabricating objections,, and seeking everyone else's opinion. Thus you become entangles in countless often contradictory thoughts, feelings, and ideas and lose touch with the God in you. And you end up dependent on all the people you have gathered around you.
Excerpt from:The Inner Voice of Love From Anguish to Freedom by Henry Nouwen — Henri J.M. Nouwen

The critical voice is not your own. — Amelia Kinkade

Knowing your inner voice and how you will confront it, is like talking to yourself in front of the mirror and appreciate it. — EllieCue

We have no idea who the fuck we are dealing with, but based on what they've done to us so far, I'm betting there is very little this person wouldn't do to get whatever the hell it is they are after. If you think for a second that I am going to sit back and watch as you step into potential danger, you are out of your fucking mind."

Her anger rose to match his. "And if you think that I'm going to take a step back just because you and I are sleeping together and your inner caveman is coming to the fore, you are out of your fucking mind."

His voice turned icy. "If I were being a caveman, I would have already knocked you over the head with my club and put you over my shoulder. Not that the idea doesn't have some merit. — L.A. Fiore

Suppose you're called on to navigate some particularly difficult life dilemma, your own, or that of a close confidant. You yearn to talk matters over with your mentor, spouse, or best friend. Yet, for whatever reason, you can't get a hold of these valued others - perhaps they're traveling, busy, or even deceased. Research shows that simply imagining having a conversation with them is as good as actually talking with them. So consult them in your mind. Ask them what advice they'd offer. In this way, a cherished parent or mentor, even if deceased, leaves you with an inner voice that guides you through challenging times. Your past moments of love and connection make you lastingly wiser. — Barbara L. Fredrickson

Trust what your instincts are telling you, it's your souls voice pointing you in the right direction. — Nikki Rowe

Use the information you've been given as an individual, but NEVER let what you've heard or read or experienced in the past prevent you from answering the call on your life.

You are responsible for your life. That includes the voice inside you and everything it calls you to do. Don't ignore that voice to follow rules that don't fit. When a jacket doesn't fit anymore, it's time to donate it. Same principle applies for rules which no longer serve you.

You don't have to curse the rules or condemn them. In fact, there might be someone else who would benefit from them at the exact moment you no longer need them.

Just step into all that you can be and all that you can do. — Stephen Lovegrove

To get past your ego and its defenses you need to get quiet, be brave, and listen to your inner voices ... When you embrace the messages of each aspect of your shadow, you begin to take back the power you've given to others and form a bond of trust with your authentic self. The voices of your unembraced qualities, when allowed into your consciousness, will bring you back into balance and harmony with your natural rhythms. — Debbie Ford

Red flags are moments of hesitation that determine our destination. — Mandy Hale

People become discouraged when they listen to their 'inner critic' ... Whatever that voice is saying, articulate a response, drawing from the part of you that feels strong and confident. Be your own cheerleader. — Lauren Mackler

Belief has the power to change your inner state and your outer world. — John Paul Warren

Whether your purpose for writing is artistic expression, communication with friends and family, the healing of the inner life, or achieving public recognition for your art - the foundation is the same: the claiming of yourself as an artist/writer and the strengthening of your writing voice through practice, study, and helpful response from other writers. — Pat Schneider

Always listen to your inner voice. — Oprah Winfrey

If you aren't hearing your inner voice, it could mean you're overburdened or not stimulated enough, or that you've learned to shut it off because the people around you have refused to engage it. Perhaps you've had a hardening of the arteries around your soul. I believe the choices we make in our lives and the people and places surrounding us increase the volume of our inner voice, decrease it, or annihilate it entirely. — Kelly Cutrone

Many of us have had Oracle experiences, though we may not have called them that.
Have you had the feeling there's a guardian angel looking out for you? Or heard an inner
voice that is not your own? Gotten a profound insight that you would not have otherwise
considered? Had your prayers answered? Especially in an unexpected way? These are a
few of the ways that the invisible world guides us. — Cristina Smith

If, on the other hand, you listen to your own inner voice, to your own inner wisdom, which is far greater than anyone else's as far as you are concerned, you will not go wrong, and you will know what to do with your life. Then time is no longer relevant. — Elisabeth Kubler-Ross

The reason is still difficult to explain, but it is not complicated. That inner voice that will not be denied, once we learn to listen to it, had whispered since the beginning, "Business is not what your life is about. Founding VISA and being its chief executive officer is something you must do, but it's only preparatory." — Dee Hock

How do you know if your inner voice or sense of guidance is your deeper-self speaking its wisdom, your unconscious childhood programming, or the voice of your Aunt Matilda? Discerning the difference between an automatic response stemming from family beliefs, childhood distortions, or culture, and guidance from our connection with our higher/deeper self, makes life, success, and relationships so much easier. — Jennifer Howard

And as for what I've learned: be an instrument of peace. Be a gentleman at all costs. Enjoy yourself - have fun with your existence. Learn to listen to your inner voice and don't overdose on yourself. Keep your darkness in check. Let music be a healing force. Be a real musician: once you start counting money before notes, you're a full-time wannabe. Put your guitar down and go outside and take a long drink of light with your eyes. Go walk in the park and take off your shoes and socks and feel the grass under your feet and mud between your toes. Go see a baby smiling, go see a wino crawling, go see life. Feel life - all of it, as much as possible. Find a human melody, then write a song about it. Make it all come through your music. — Carlos Santana

There is point in your life when you come face to face with the reality that you cannot take another step on your own. For me, I had never experienced that point, but depression brought me there. I have slowly, painfully and continually been confronted by my brokenness. Coming to terms with the fact that I am broken has been at the center of my accepting my being loved.
For me, now, there exists a sense of desperate need for what God brings to my spiritual and mental self. Without His voice I cannot cope with the darkness, but with His whisper of "you are My beloved", I can take a step each day away from the chasm. I am broken but not beyond mending, not beyond love.
It has been this desperation that has opened a crevice in which I am seeing Him for the first time. He is why my soul can find some peace even when my mind is dark and numb. It is this love that continually has brought me back from the edge of the impostor to the honesty of my broken, inner self — David Hulon Hood

Your inner voice whispers, but speaks the loudest. — Matshona Dhliwayo

Buddha is a Buddha, a Krishna is a Krishna, and you are you. And you are not in any way less than anybody else. Respect yourself, respect your own inner voice and follow it. — Osho

Pay attention to the inner voice that tells you when something feels right. Much of your creative problem-solving occurs at an unconscious level. — Nita Leland

You are your master. Only you have the master keys to open the inner locks. — Amit Ray

You can live a life of either trusting your inner voice or distrusting your inner voice. You can cling to familiar expectations, conventions, and "reasonable" responses or you can listen to the sweet madness in your bones. — Tama J. Kieves

Your instinct is your divine being. — Lailah Gifty Akita

Revolution doesn't have to do with smashing something; it has to do with bringing something forth. If you spend all your time thinking about that which you are attacking, then you are negatively bound to it. You have to find the zeal in yourself and bring that out. — Joseph Campbell

Magazines and opinions of you and stuff like that, those will change, but your opinion of yourself does not have to based on what other people say. So I just learned that my inner voice has to be louder than their outside voice. — Jennifer Love Hewitt

Ambition is your inner voice that tells you, you can, and should, strive to go beyond your circumstances or situation in life. — Lloyd Blankfein

Ignore the received wisdom of any industry you're entering. Never be trapped by dogma. Never let other people's opinions drown out your own inner voice. — Tim Waterstone

Inner voice is the divine voice. — Lailah Gifty Akita

It does not matter how old or wise you get, life is about believing and listening to your inner voice. I still believe in angels, fairies and butterflies and that keeps me smiling. Ambika — Jack Canfield

My inner voice told me at that point,
"you shouldn't be caring about her, just move on! You have to improve your life and live apart from her"

But my absurd heart was pleading,
"you love her, you idiot. She is your life sphere, one more try at least for the sake of kindness. — Qalandar Nawaz

Now, motivational patterns are going to be similar among all espionage agents. That is to say: there will be certain types of motivation that are similar despite differing schools or opposed aims. You will study first how to separate this element for your analysis - in the beginning, through interrogation patterns that betray the inner orientation of the interrogators; secondly, by close observation of language-thought orientation of those under analysis. You will find it fairly simple to determine the root languages of your subjects, of course, both through voice inflection and speech pattern. — Frank Herbert

Some believe to be spiritual, is to be always loving and shit ...
Being spiritual is taking no shit, by believing that your voice deserves to be heard if the deed is not satisfying your soul. — Nikki Rowe

I'm a classic example of what can happen if you follow your inner voice. I was cursed with interests and some talent in many different areas. It confuses people. — Dirk Benedict

I have not always chosen the safest path. I've made my mistakes, plenty of them. I sometimes jump too soon and fail to appreciate the consequences. But I've learned something important along the way: I've learned to heed the call of my heart. I've learned that the safest path is not always the best path and I've learned that the voice of fear is not always to be trusted. — Steve Goodier

Five Truths About Your Inner Voice:
1. It is here, always available, wherever you are, however you feel, whatever you have done.
2. It is solely on your side.
3. It knows what's absolutely right for you.
4. It is your friend, your ally, your guide, your ultimate supporter.
5. It is always with you and for you.
Whenever you're feeling perplexed, uneasy, anxious, mad, frustrated, sick, or any other other way you don't want to feel, ask your Inner Voice. Listen. — Noelle Sterne

They tell you: Follow your dreams. Listen to your spirit. Change the world. Make your mark. Find your inner voice and make it sing. Embrace failure. Dream. Dream and dream big. As a matter of fact, dream and don't stop dreaming until your dream comes true.
I think that's crap.
I think a lot of people dream. And while they are busy dreaming, the really happy people, the really successful people, the really interesting, powerful, engaged people? Are busy doing. — Shonda Rhimes

When you're following your inner voice, doors tend to eventually open for you, even if they mostly slam at first. — Kelly Cutrone

Trust your inner voice. — Lynn A. Robinson

If you must have a rule to follow, I would suggest cultivating a dialogue with your inner voice ... If you listen to the clues your own images offer, the resulting work will be fresh, and authentic. Fall in love with your world ... — Jane Fulton Alt

Stop!" She advances on me with the most severe, stern look I've ever seen from her, and she yells in a strong voice. "No more. Get it out of your head, Kai! We are not running. This is happening whether you like it or not. It's time to get your game face on and get ready to kick some ass."
Holy ... I honestly didn't think her capable of this kind of verbal badassery. Even in handcuffs she has taken control, walloped me, and forced my whiney inner child into a corner. — Wendy Higgins

The tenth gift is Wisdom. Guiding your way, wisdom will lead you through knowledge to understanding. May you hear its soft voice. — Charlene Costanzo

Your spirit knows your purpose, your calling, and your highest potential. It may come as that inner voice that nudges you, saying There's something bigger out there for you. You have a larger purpose. LISTEN. — Lynn A. Robinson

God will shout during your storms, whisper during your sunshine and sing during the rarest rainbows you will encounter. — Shannon L. Alder

I believe that what we get out of life is what we've set ourselves up to get, so there's no such thing as an inconsequential decision. Our destinies are the culmination of all the choices we've made along the way, which is why it's imperative to listen hard to your inner voice when it speaks up.
Don't let anyone else's noise drown it out. — Megan McCafferty

Many feel they are called to the priesthood, but what they really hear is an inner voice saying, 'It's indoor work with no heavy lifting, do you want to be a ploughman like your father?' — Terry Pratchett

I'm a believer in fate and in fulfilling your destiny. I've always had a kind of inner voice that I have learned to listen to. — Tom Ford

Everyone has that inner voice, the one that's a Negative Nancy. I'd say to ignore that voice and to be confident and follow your heart. — Katharine McPhee

You ought to follow your inner voice. — Lailah Gifty Akita

Your inner voice and the spiritual guidance...will lead you to your goal. — Mary Ellen Flora

My wish is that this book has inspired you to listen to your inner voice, to listen to the spirits around you, and to know that you are surrounded by guides and angels who are just waiting for you to ask for their guidance. Don't ignore those little "signs." Yes, you do feel them and you do sense your loved ones. We are all mediums and the veil is becoming thinner and thinner. — Gail Thackray

It's called an inner voice for a reason. It's the gnawing feeling inside your stomach telling you yes or no. It's the one voice in your life that isn't tampered by other's biased opinions, scars, feelings or thoughts. Go with it, you know yourself better than anyone ever does. — Hope Alcocer

Led him into the water. When they were waist deep, Philip declared in a voice that rang strong over the sunlight sparkling upon the water's surface, I baptize you in the name of our Lord Jesus Christ. As the water washes your outer body, so may the Spirit cleanse the inner man. Rise up into the eternal life that has been prepared for you! — Davis Bunn

To find your angels ... Start trusting your inner voice and intuition — Melanie

Rather than listening to a person with a louder voice. Empower yourself by listening to your inner voice. — Brian Michael Good

Along with a strong belief in your own inner voice, you also need laser-like focus combined with unwavering determination. — Larry Flynt

Listen to your inner voice... for it is a deep and powerful source of wisdom, beauty and truth, ever flowing through you... Learn to trust it, trust your intuition, and in good time, answers to all you seek to know will come, and the path will open before you. — Caroline Joy Adams

When your roots are receiving nourishment from the earth in the first chakra, your creative juices are flowing in the second, your intentions are empowered in the third, your heart is open and exchanging love with those around you in the fourth, you are spontaneously expressing your highest self in the fifth, and you are in touch with your inner voice in the sixth, then energy moves into the crown chakra and you remember your essential nature as infinite and unbounded. The thousand-petaled lotus flower unfolds and you know yourself as a spiritual being temporarily localized to a body and mind. — Anonymous

Listen to your instinct. It is your greatest treasure. Your beauty in the outside reflects your inner beauty. — Lailah Gifty Akita

In this new year, may you have a deep understanding of your true value and worth, an absolute faith in your unlimited potential, peace of mind in the midst of uncertainty, the confidence to let go when you need to, acceptance to replace your resistance, gratitude to open your heart, the strength to meet your challenges, great love to replace your fear, forgiveness and compassion for those who offend you, clear sight to see your best and true path, hope to dispel obscurity, the conviction to make your dreams come true, meaningful and rewarding synchronicities, dear friends who truly know and love you, a childlike trust in the benevolence of the universe, the humility to remain teachable, the wisdom to fully embrace your life exactly as it is, the understanding that every soul has its own course to follow, the discernment to recognize your own unique inner voice of truth, and the courage to learn to be still. — Janet Rebhan

There is no list of rules. There is one rule. The rule is: there are no rules. Happiness comes from living as you need to, as you want to. As your inner voice tells you to. Happiness comes from being who you actually are instead of who you think you are supposed to be. Being traditional is not traditional anymore. It's funny that we still think of it that way. Normalize your lives, people. You don't want a baby? Don't have one. I don't want to get married? I won't. You want to live alone? Enjoy it. You want to love someone? Love someone. Don't apologize. Don't explain. Don't ever feel less than. When you feel the need to apologize or explain who you are, it means the voice in your head is telling you the wrong story. Wipe the slate clean. And rewrite it. No fairy tales. Be your own narrator. And go for a happy ending. One foot in front of the other. You will make it. — Shonda Rhimes

We call it keeping up with the Joneses. They buy a boat and we buy a bigger one. They get a new TV and we get a big screen. They start a business and we start planning our articles of incorporation and the first stock release. And while we're so busy keeping up, we ignore our soul, the inner voice, that's telling us that it really wants to teach children to read. While it helps to identify with each other, we're not the same. So why compare ourselves on the basis of material things? Are you walking a path with heart in your own life, regardless of what others have? — Melody Beattie

When you're in transition, you will need to find a different kind of security. It's not one of labels, guarantees or bank balances. It's guidance - the directions of your own inner voice. Moment by moment you know what to do. You are safer than ever before. — Tama J. Kieves

My love, you are closer to me than myself ...
You shine through my eyes,
Your light is brighter than the Moon ...
Step into the garden so all the flowers ...
Even the tall poplar can kneel before your beauty ...
Let your voice silence the lily famous for its hundred tongues,
When you want to be kind ...
You are softer than the soul ...
But when you withdraw ...
You can be so cold and harsh.
Dear one, you can be wild and rebellious ...
But when you meet him face to face ...
His charm will make you docile like the earth,
Throw away your shield and bare your chest ...
There is no stronger protection than him.
That's why when the Lover withdraws from the world ...
He covers all the cracks in the wall ...
So the outside light cannot come though,
He knows that only the inner light illuminates his world! — Rumi

If you really want to find your voice, your goal is to journey toward inner wholeness
which is what life is about anyway. It involves self-acceptance and genuine self-respect.
from Unleash the Writer Within — Cecil Murphey

My reality is that God speaks to you every day. There's an inner voice, and when you hear it, you get a little tingle in your medulla oblongata at the back of your neck, a little shiver, and at two o'clock in the morning, everything's really quiet and you meditate and you got the candles, you got the incense and you've been chanting, and all of a sudden you hear this voice: Write this down. It is just an inner voice, and you trust it. That voice will never take you to the desert. — Carlos Santana

Choices, Choices, Choices!
Listen to your instincts; you will make the best-choices. — Lailah Gifty Akita

Listen to your heart.
Listen to your instincts.
Listen to inner voice.
It is your true self.
It will guide you to make the right choices. — Lailah Gifty Akita

Turn down the volume of your negative inner voice and create a nurturing inner voice to take it's place. When you make a mistake, forgive yourself, learn from it, and move on instead of obsessing about it. Equally important, don't allow anyone else to dwell on your mistakes or shortcomings or to expect perfection from you. — Beverly Engel

I am not against rules, but the rules should arise out of your understanding. They should not be imposed from the outside. I am not against discipline! but discipline should not be slavery. All true discipline is self-discipline. And self-discipline is never against freedom - in fact, it is the ladder to freedom. Only disciplined people become free, but their discipline is not obedience to others: their discipline is obedience to their own inner voice. And they are ready to risk anything for it. Let your own awareness decide your lifestyle, life pattern. Don't allow anybody else to decide it. That is a sin, to allow anybody else to decide it. Why is it a sin? Because you will never be in your life. It will remain superficial, it will be hypocrisy. — Osho

Change Your Thoughts and Watch Your Actions Change. When you hear your inner voice throwing critical comments, become cognizant of when they occur. Exchange the negative banter with a specific, positive thought. Over time, you'll notice the inner critic shows up less and less replaced by positive thoughts (and action). — Lisa A. Mininni

Reflecting on various aspects of our lives is essential for a person to grow and adjust to changing phases in their life. Self-analysis entails examining a person's existing level of self-esteem and documenting the inner voice that speaks to a person, which is frequently either affirming of self-defeating. Failure to periodically engage in self-analysis, make crucial revisions in our personas, and modify our thinking patterns when we encounter transformative events in life can lead to mood disorders, burnout, and other emotional maladies. — Kilroy J. Oldster

The voice in your head is like a wild horse taking you wherever it wants to go ... When the voice in your head finally stops talking, you experience inner peace. — Miguel Angel Ruiz

We struggle with a seditious inner voice that says, "You're wasting time. Get up and do something with your life. — Pamela D. Blair

Ever since I made the decision to drop a few pounds - way less easy than it sounds, by the way - I've become obsessed with my size, and in so doing I've inadvertently allowed my inner critic to have a voice. And you know what? She's a bitch. Like now when I see my underpants in the laundry, I no longer think Soft! Cotton! Sensible! Instead I hear her say Damn, girl, these panties be huge."
"Your inner critic has terrible grammar."
"I know, it's the only way I can take away some of her power over me ... — Jen Lancaster

Moment after moment, completely devote yourself to listening to your inner voice. — Shunryu Suzuki

Poetry expresses emotion. What does your inner poet convey? — Kym Gordon Moore

Lend an ear to your inner voice and intuition — Sunday Adelaja

The most influential and frequent voice you hear is your inner-voice. It can work in your favor or against you, depending on what you listen to and act upon. — Maddy Malhotra

Learn to listen and trust your inner voice — Rajneesh

Follow your heart, listen to your inner voice, and always remember that it's never to late to make your dreams come true — Sandra Golden

Presently we have to train our unconscious to function better. Then we can depend upon our instincts, that will be noble instincts. At this moment, our instincts are very impure. When we have practiced for a long time, living the higher values of life and following the instructions of great masters or the Scriptures, that is when you have trained your unconscious. Then when a situation comes, you can to an extent, depend on your inner voice. — Chinmayananda Saraswati

We all have an inner voice, our personal whisper from the universe. All we have to do is listen
feel and sense it with an open heart. Sometimes it whispers of intuition or precognition. Other times, it whispers an awareness, a remembrance from another plane. Dare to listen. Dare to hear with your heart. — C.J. Heck

Your time is limited, so don't waste it living someone else's life. Don't be trapped by dogma - which is living with the results of other people's thinking. Don't let the noise of other's opinions drown out your own inner voice. And most important, have the courage to follow your heart and intuition. They somehow already know what you truly want to become. Everything else is secondary. — Steve Jobs

Your life is not predestined, as in Calvinist thought, where everything is written down in the book of life long before your birth and is inescapable. There are choices, accidents, hints and wrong paths, and the ego you, or whatever you call yourself, is a factor in all this. But there is still this other factor that keeps calling. At some moment, people turn, in despair or when they are unable to go any longer on a certain route, and this inner voice says, "Where have you been? I've been waiting for you to turn to me for a long time." — James Hillman

When you do a drama, you are challenged to trust your inner voice much more. Because when you put a comedy in front of even a 25-person screening, you know whether it's working or not. The barometer is overt. — Shawn Levy

Within our core self is an indelible blueprint of unrivaled individuality - the singular being that each of us exists to express. In this three-dimensional movie called "Life" there are no stand-ins, body doubles, or understudies - no one can fill in for us by proxy! Realization of this truth alone eliminates the need to imitate, conform, limit, or betray our loyalty to the originality of Self. Imagine the relief of removing your carefully crafted masks fashioned by societal forms of conditioning and instead responding to what comes into your experience directly from your Authentic Self. One of the first principles to honor in your relationship with yourself is to respect and trust your own inner voice. This form of trust is the way of the heart, the epitome of well-being. — Michael Bernard Beckwith

The only way you can find it is through being alone with your thoughts at sufficiently long intervals to give that inner voice within you a chance to cry out in distinguishable language for you. 'Here I am within you.' That is the silent voice, the voice of nature, which speaks to everyone who will listen. — Walter Russell

You have permission to walk away from anything that doesn't feel right. Trust your instincts and listen to your inner-voice - it's trying to protect you. — Bryant McGill

Solve all your problems through meditation. Exchange unprofitable religious speculations for actual God-contact. Clear your mind of dogmatic theological debris; let in the fresh, healing waters of direct perception. Attune yourself to the active inner Guidance; the Divine Voice has the answer to every dilemma of life. Through man's ingenuity for getting himself into trouble appears to be endless, the Infinite Succor is no less resourceful. — Lahiri Mahasaya

The greatest temptation for the like of us is: to renounce violence, to repent, to make peace with oneself. Most revolutionaries fell before this temptation, from Spartacus to Danton and Dostoevsky; they are the classical form of betrayal of the cause. The temptations of God were always more dangerous for mankind than those of Satan. As long as chaos dominates the world, God is an anachronism; and every compromise with one's own conscience is perfidy. When the accursed inner voice speaks to you, hold your hands over your ears ... . — Arthur Koestler