To reduce man to the duties of his own city, and to disengage him from duties to the members of other cities, is to break the universal society of the human race.

The works of nature must all be accounted good.

The foolishness of old age does not characterize all who are old, but only the foolish.

The best interpreter of the law is custom.

What we call pleasure, and rightly so is the absence of all pain.

Nature has planted in our minds an insatiable longing to see the truth.

Diseases of the soul are more dangerous and more numerous than those of the body.