Μίμησιν μὲν γὰρ δὴ καὶ ἀπεικασίαν τὰ παρὰ πάντων ἡμῶν ῥηθέντα χρεών που γενέσθαι. - Plato

Parmenides: I was pleased with you, Socrates, because you would not discuss the doubtful question in terms of visible objects or in relation to them, but only with reference to what we conceive most entirely by the intellect and may call ideas… But if you wish to get better training, you must do something more than that; you must consider not only what happens if a particular hypothesis is true, but also what happens if it is not true.

[Aristotle] was the most eminent of all the pupils of Plato…. He seceded from Plato while he was still alive; so that they tell a story that [Plato] said, "Aristotle has kicked us off, just as chickens do their mother after they have been hatched."

Do you desire to be wholly one; always day and night in one another's company? For if this is what you desire, I am ready to melt and fuse you together, so that being two you shall become one, and while you live a common life as if you were a single man, and after your death in the world below still be one departed soul, instead of two....