We scientists, whose tragic destination has been to help in making the methods of annihilation more gruesome and more effective, must consider it our solemn and transcendent duty to do all in our power in preventing these weapons from being used for the brutal purpose for which they were invented.

The difference between what the most and the least learned people know is inexpressibly trivial in relation to that which is unknown.

How vile and despicable war seems to me! I would rather be hacked to pieces than take part in such an abominable business.

The release of atom power has changed everything except our way of thinking ... the solution to this problem lies in the heart of mankind. If only I had known, I should have become a watchmaker.