And what, Socrates, is the food of the soul? Surely, I said, knowledge is the food of the soul.
PlatoDesires are only the lack of something: and those who have the greatest desires are in a worse condition than those who have none, or very slight ones.
PlatoAll soul is immortal. For that which is always in movement is immortal; that which moves something else, and is moved by something else, in ceasing from movement ceases from living. So only that which moves itself, because it does not abandon itself, never stops moving. But it is also source and first principle of movement for the other things which move.
Plato