Religions that teach brotherly love have been used as an excuse for persecution, and our profoundest scientific insight is made into a means of mass destruction.

To teach how to live without certainty and yet without being paralysed by hesitation is perhaps the chief thing that philosophy, in our age, can do for those who study it.

Dogmatism and skepticism are both, in a sense, absolute philosophies; one is certain of knowing, the other of not knowing. What philosophy should dissipate is certainty, whether of knowledge or ignorance.

I think we ought always to entertain our opinions with some measure of doubt. I shouldn't wish people dogmatically to believe any philosophy, not even mine.

The idea of the peace movement and of people who spent their entire lives trying to have a more egalitarian, just society, suddenly became swamped by the record industry, by the new rock and roll culture, and by the idea of not trusting anyone over thirty.

The time was not yet ripe for the growth of mathematical science among us, and any development that might have taken place in that direction was rudely stopped by the civil war.

Rushing to war is not a wise course of action.

With the help of dedicated Americans from our party, every party, and no party at all, I intend to mount that stairway to preach peace for our nation and world.