God, Nature, the wise, the world, preach man, exhort him both by word and deed to the study of himself.

He that boasts of his ancestors confesses that he has no virtue of his own. No person ever lived for our honor; nor ought that to be reputed ours, which was long before we had a being; for what advantage can it be to a blind man to know that his parents had good eyes? Does he see one whit the better?

The true science and study of mankind is man.

Mutability is the badge of infirmity. It is seldom that a man continues to wish and design the same thing two days alike. Now he is for marrying; and now a mistress is preferred to a wife. Now he is ambitious and aspiring; presently the meanest servant is not more humble than he. This hour he squanders his money away; the next he turns miser. Sometimes he is frugal and serious; at other times profuse, airy, and gay.

The proper Science and Subject for Man's Contemplation is Man himself. [Fr., La vraie science et le vrai etude de l'homme c'est l'homme.]