i have never pondered over questions that are not questions.

To die proudly when it is no longer possible to live proudly. Death of one's own free choice, death at the proper time, with a clear head and with joyfulness, consummated in the midst of children and witnesses: so that an actual leave-taking is possible while he who is leaving is still there.

But this word will I say to my enemies: What is all manslaughter in comparison with what you have done to me!

Does not the discipline of the scientific spirit just commence when one no longer harbours any conviction?

Assuming that we have trained our imagination to denounce the past, we will not suffer much from unfulfilled wishes.

Only strong personalities can endure history, the weak are extinguished by it.

Many are obstinate with regard to the pathway once they have set upon it, few with regard to the goal.