Those who are slow to know suppose that slowness is the essence of knowledge.

Mathematics is merely the means to a general and ultimate knowledge of man.

When one is young, one venerates and despises without that art of nuances which constitutes the best gain of life.

Do ask yourself why you, the individual, exist, and if you can get no other answer try for once to justify the meaning of your existence as it were a posteriori by setting before yourself an aim, a goal, a 'to this end', an exalted and noble 'to this end'.

With one more talent one frequently stands with greater instability than with one less, as a table stands better on three legs than on four.

If one uses one's intellect to become master over the unlimited emotions, it may produce a sorry and diversionary effect upon the intellect.

Life is a well of joy; but for those out of whom an upset stomach speaks, which is the father of melancholy, all wells are poisoned.