The science [geometry] is pursued for the sake of the knowledge of what eternally exists, and not of what comes for a moment into existence, and then perishes.

The greatest mistake physicians make is that they attempt to cure the body without attempting to cure the mind, yet the mind and the body are one and should not be treated separately!

The wisest have the most authority.

A good education consists in knowing how to sing and dance well.

Don't quarrel with your parents even if you are on the right.

One man cannot practice many arts with success.

And may we not say, Adeimantus, that the most gifted minds, when they are ill- educated, become the worst?