You need some knowledge to recognize knowledge, so where does the first knowledge come from?

We must, if we are to be consistent, and if we re to have a real pedigree herd, mate the best of our men with the best of our women as often as possible, and the inferior men with the inferior women as seldom as possible, and keep only the offspring of the best.

Education is teaching our children to desire the right things.

For the rhapsode ought to interpret the mind of the poet to his hearers, but how can he interpret him well unless he knows what he means?

Science is nothing but perception.

The physician, to the extent he is a physician, considers only the good of the patient in what he prescribes, and his own not at all

Thinking and spoken discourse are the same thing, except that what we call thinking is, precisely, the inward dialogue carried on by the mind with itself without spoken sound.