Take charge of your thoughts. You can do what you will with them

For the introduction of a new kind of music must be shunned as imperiling the whole state; since styles of music are never disturbed without affecting the most important political institutions.

The honour of parents is a fair and noble treasure to their posterity, but to have the use of a treasure of wealth and honour, and to leave none to your successors, because you have neither money nor reputation of your own, is alike base and dishonourable.

O youth or young man, who fancy that you are neglected by the gods, know that if you become worse, you shall go to worse souls, or if better to the better... In every succession of life and death, you will do and suffer what like may fitly suffer at the hands of like. This is the justice of heaven.

Hardly any human being is capable of pursuing two professions or two arts rightly.

I can show you that the art of calculation has to do with odd and even numbers in their numerical relations to themselves and to each other.

Mob rule and emasculation of the wise' and 'who will watch the guardians'?