Pre Socratic Quotes & Sayings

The pre-Socratic Greek philosopher Parmenides taught that the only things that are real are things which never change ... and the pre-Socratic Greek philosopher Heraclitus taught that everything changes. If you superimpose their two views, you get this result: Nothing is real. — Philip K. Dick

Pre-Socratic philosophy begins ... with the discovery of Nature; Socratic philosophy begins with the discovery of man's soul."3 — William B. Irvine

More about the selection theory: Jerne meant that the Socratic idea of learning was a fitting analogy for 'the logical basis of the selective theories of antibody formation': Can the truth (the capability to synthesize an antibody) be learned? If so, it must be assumed not to pre-exist; to be learned, it must be acquired. We are thus confronted with the difficulty to which Socrates calls attention in Meno [ ... ] namely, that it makes as little sense to search for what one does not know as to search for what one knows; what one knows, one cannot search for, since one knows it already, and what one does not know, one cannot search for, since one does not even know what to search for. Socrates resolves this difficulty by postulating that learning is nothing but recollection. The truth (the capability to synthesize an antibody) cannot be brought in, but was already inherent. — Niels Kaj Jerne

As the Pre- Socratic philosopher failed to distinguish between the universal and the true, while he placed the particulars of sense under the false and apparent, so Plato appears to identify negation with falsehood, or is unable to distinguish them. The greatest service rendered by him to mental science is the recognition of the communion of classes, which, although based by him on his account of 'Not-being,' is independent of it. — Plato

The Alexandrian Library was a tragedy of some moment, for it was believed to contain the complete published works of Aeschylus, Sophocles, Polybius, Livy, Tacitus, and a hundred others, who have come down to us in mangled form; full texts of the pre-Socratic philosophers, who survive only in snatches; and thousands of volumes of Greek, Egyptian, and Roman history, science, literature, and philosophy. — Will Durant