Kant's style is so heavy that after his pure reason, the reader longs for unreasonableness.

For me writing biographies is impossible, unless they are brief and concise, and these are, I feel, the most eloquent.

Perhaps my dynamite plants will put an end to war sooner than your [pacifist] congresses. On the day two army corps can annihilate each other in one second all civilized nations will recoil from war in horror.

A recluse without books and ink is already in life a dead man.

My home is where I work, and I work everywhere.

I have not the slightest pretension to call my verses poetry; I write now and then for no other purpose than to relieve depression or to improve my English.

The savants will write excellent volumes. There will be laureates. But wars will continue just the same until the forces of the circumstances render them impossible.