What we have to discover for ourselves leaves behind in our mind a pathway that can be used on another occasion.

One is rarely an impulsive innovator after the age of sixty, but one can still be a very fine orderly and inventive thinker. One rarely procreates children at that age, but one is all the more skilled at educating those who have already been procreated, and education is procreation of another kind.

Barbaric accuracy - whimpering humility.

What is called an acute knowledge of human nature is mostly nothing but the observer's own weaknesses reflected back from others.

Of all the inventions of man I doubt whether any was more easily accomplished than that of a Heaven.

The most successful tempters and thus the most dangerous are the deluded deluders.

Cautiousness in judgment is nowadays to be recommended to each and every one: if we gained only one incontestable truth every ten years from each of our philosophical writers the harvest we reaped would be sufficient.