.. we shall not be properly educated ourselves, nor will the guardians whom we are training, until we can recognise the qualities of discipline, courage, generosity, greatness of mind, and others akin to them, as well as their opposites in all their manifestations.

Must not all things at the last be swallowed up in death?

No attempt should be made to cure the body without the soul

It is not noble to return evil for evil, at no time ought we to do an injury to our neighbors.

For a man to conquer himself is the first and noblest of all victories.

He who can properly define and divide is to be considered a god.

[Not enough is known about solid geometry] and for two reasons: in the first place, no government places value on it; this leads to a lack of energy in the pursuit of it, and it is difficult. In the second place, students cannot learn it unless they have a teacher. But then a teacher can hardly be found.