The most excellent and divine counsel, the best and most profitable advertisement of all others, but the least practised, is to study and learn how to know ourselves. This is the foundation of wisdom and the highway to whatever is good. . . . God, Nature, the wise, the world, preach man, exhort him both by word and deed to the study of himself.

Pleasure and pain, though directly opposite are contrived to be constant companions.

The true science and study of mankind is man.

Wise men mingle mirth with their cares, as a help either to forget or overcome them; but to resort to intoxication for the ease of one's mind is to cure melancholy by madness.

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.

[Envy not for...] Whatever difference there may appear to be in men's fortunes, there is still a certain compensation of good and ill in all, that makes them equal.

Gratitude is a duty none can be excused from, because it is always at our own disposal.