It is the certainty that they possess the truth that makes men cruel.

People who have no weaknesses are terrible; there is no way of taking advantage of them.

Change is the essence of life.

The more you say, the less they remember.

Do not try to satisfy your vanity by teaching a great many things. Awaken people's curiosity. It is enough to open minds; do not overload them. Put there just a spark. If there is some good inflammable stuff, it will catch fire.

That man is prudent who neither hopes nor fears anything from the uncertain events of the future.

The truth is that life is delicious, horrible, charming, frightful, sweet, bitter, and that is everything.