The true science and study of mankind is man.

Pleasure and pain, though directly opposite, are yet so contrived by nature as to be constant companions; and it is a fact that the same motions and muscles of the face are employed both in laughing and crying.

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

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.

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

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.