In revolutions the occasions may be trifling but great interest are at stake.

For as the eyes of bats are to the blaze of day, so is the reason in our soul to the things which are by nature most evident of all.

It is our choice of good or evil that determines our character, not our opinion about good or evil.

Men pay most attention to what is their own: they care less for what is common; or, at any rate, they care for it only to the extent to which each is individually concerned.

Every realm of nature is marvelous.

Friendship is a single soul dwelling in two bodies.

The soul has two parts, one rational and the other irrational. Let us now similarly divide the rational part, and let it be assumed that there are two rational faculties, one whereby we contemplate those things whose first principles are invariable, and one whereby we contemplate those things which admit of variation.