The truth isn't always a blinding light. Sometimes it's a deep and dazzling darkness, that illuminates - and burns - just as surely.

There exists a passion for comprehension, just as there exists a passion for music. That passion is rather common in children, but gets lost in most people later on. Without this passion there would be neither mathematics nor natural science.

I am not only a pacifist but a militant pacifist. I am willing to fight for peace. Nothing will end war unless the people themselves refuse to go to war.

My comprehension of God comes from a deeply felt conviction of a superior intelligence that reveals itself in the knowable world.

The pioneers of a warless world are the young men (and women) who refuse military service.

By academic freedom I understand the right to search for truth and to publish and teach what one holds to be true. This right also implies a duty: one must not conceal any part of what one has recognized to be true.

Do you remember how electrical currents and 'unseen waves' were laughed at? The knowledge about man is still in its infancy.