One man cannot practice many arts with success.

It behooves those who take the young to task to leave them room for excuse, lest they drive them to be hardened by too much rebuke.

The cause of all the blunders committed by man arises from this excessive self-love. For the lover is blinded by the object loved; so that he passes a wrong judgment on what is just, good and beautiful, thinking that he ought always to honor what belongs to himself in preference to truth. For he who intends to be a great man ought to love neither himself nor his own things, but only what is just, whether it happens to be done by himself, or by another.

Mankind will never see an end of trouble until lovers of wisdom come to hold political power, or the holders of power become lovers of wisdom

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.

What is honored in a country will be cultivated there.

The beginning is half of the whole.