The person attempting to travel two roads at once will get nowhere.

The nature of man is evil; what is good in him is artificial.

Human nature is what Heaven supplies.

They are done merely for ornament. ... the common people regard them as supernatural.

Human nature is such that people are born with a love of profit If they follow these inclinations, they will struggle and snatch from each other, and inclinations to defer or yield will die.

If you wish to see the thousand years, look at today; if you wish to understand the millionfold, then look at the one or the two.

Misery is evil; quarreling, a misfortune. There is only one possibility of avoiding both: a clear division of society. [Otherwise] the strong tyrannize the weak, the intelligent frighten the stupid, the inferior resist the superior, and the young mock the old.