It is the active exercise of our faculties in conformity with virtue that causes happiness, and the opposite activities its opposite.

Thou wilt find rest from vain fancies if thou doest every act in life as though it were thy last.

He who can be, and therefore is, another's, and he who participates in reason enough to apprehend, but not to have, is a slave by nature.

But since there is but one aim for the entire state, it follows that education must be one and the same for all, and that the responsibility for it must be a public one, not the private affair which it now is, each man looking after his own children and teaching them privately whatever private curriculum he thinks they ought to study.

All food must be capable of being digested, and that what produces digestion is warmth; that is why everything that has soul in it possesses warmth.

All who have meditated on the art of governing mankind have been convinced that the fate of empires depends on the education of youth.

Those who excel in virtue have the best right of all to rebel, but then they are of all men the least inclined to do so.