There is no patriotic art and no patriotic science.

I curse all negative purism that tells me not to use a word from another language that either expresses something that my own language cannot or does that in a more delicate manner.

The best genius is that which absorbs and assimilates everything without doing the least violence to its fundamental destiny.

Hope enough to remove all anxious fears concerning the future.

Patriotism ruins history.

No limit, no definition, may restrict the range or depth of the human spirit's passage into its own secrets or the world's.

Would you require a wretched being, whose life is slowly wasting under a lingering disease, to despatch himself at once by the stroke of a dagger? Does not the very disorder which consumes his strength deprive him of the courage to effect his deliverance?