The object of knowledge is what exists and its function to know about reality.

The wise man will want to be ever with him who is better than himself.

The soul is like a pair of winged horses and a charioteer joined in natural union.

Let no-one ignorant of geometry enter. Said to have been inscribed above the door of Plato's Academy.

But this is not difficult, O Athenians! to escape death; but it is much more difficult to avoid depravity, for it runs swifter than death. And now I, being slow and aged, am overtaken by the slower of the two; but my accusers, being strong and active, have been overtaken by the swifter, wickedness. And now I depart, condemned by you to death; but they condemned by truth, as guilty of iniquity and injustice: and I abide my sentence, and so do they. These things, perhaps, ought so to be, and I think that they are for the best.

As there are misanthropists or haters of men, so also are there misologists, or haters of ideas.

Equals, the proverb goes, delight in equals.