There is no God, Nature sufficeth unto herself; in no wise hath she need of an author.

Let us give ourselves indiscriminately to everything our passions suggest, and we will always be happy…Conscience is not the voice of Nature but only the voice of prejudice.

We owe more to habit than to Nature, my friend. The latter creates us; the other shapes us.

Nature, who for the perfect maintenance of the laws of her general equilibrium, has sometimes need of vices and sometimes of virtues, inspires now this impulse, now that one, in accordance with what she requires.