The greatest events-they are not our loudest but our stillest hours.

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

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

What destroys a man more quickly than to work, think and feel without inner necessity, without any deep personal desire, without pleasure - as a mere automaton of duty?

To discover he is loved in return ought really to disenchant the lover with the beloved.

One who has a why can endure anyhow.

I love him whose soul is deep even in the wounding