Those who have been eminent in philosophy, politics, poetry, and the arts have all had tendencies toward melancholia.

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.

We are better able to study our neighbours than ourselves, and their actions than our own.

Neither should we forget the mean, which at the present day is lost sight of in perverted forms of government; for many practices which appear to be democratical are the ruin of democracies, . . Those who think that all virtue is to be found in their own party principles push matters to extremes; they do not consider that disproportion destroys a state.

Education is the best provision for old age.

Hence both women and children must be educated with an eye to the constitution, if indeed it makes any difference to the virtue of a city-state that its children be virtuous, and its women too. And it must make a difference, since half the free population are women, and from children come those who participate in the constitution.

Should a man live underground, and there converse with the works of art and mechanism, and should afterwards be brought up into the open day, and see the several glories of the heaven and earth, he would immediately pronounce them the work of such a Being as we define God to be.