In the works of Nature, purpose, not accident, is the main thing.

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.

There is nothing grand or noble in having the use of a slave, in so far as he is a slave; or in issuing commands about necessary things. But it is an error to suppose that every sort of rule is despotic like that of a master over slaves, for there is as great a difference between the rule over freemen and the rule over slaves as there is between slavery by nature and freedom by nature . .

Happiness is the meaning and the purpose of life, the whole aim and end of human existence.

In cases of this sort, let us say adultery, rightness and wrongness do not depend on committing it with the right woman at the right time and in the right manner, but the mere fact of committing such action at all is to do wrong.

... the science we are after is not about mathematicals either none of them, you see, is separable.

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