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

To owe an obligation to a worthy friend is a happiness, and can be no disparagement.

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

Those who have nothing else to recommend them to the respect of others but only their blood, cry it up at a great rate, and have their mouth perpetually full of it. They swell and vapor, and you are sure to hear of their families and relations every third word.

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.

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.

It is certainly much easier wholly to decline a passion than to keep it within just bounds and measures; and that which few can moderate almost anybody may prevent.