Certitude is seized by some minds, not because there is any philosophical justification for it, but because such minds have an emotional need for certitude.

Belief in the traditional sense, or certitude, or dogma, amounts to the grandiose delusion, "My current model" -- or grid, or map, or reality-tunnel -- "contains the whole universe and will never need to be revised." In terms of the history of science and knowledge in general, this appears absurd and arrogant to me, and I am perpetually astonished that so many people still manage to live with such a medieval attitude.

The longer one is alone, the easier it is to hear the song of the earth.

Stupidity is like bumping into a wall all the time. After a while you get tired of it and try to look the situation over and see if there’s a doorway somewhere. I think most people eventually do look for the doorway and stop bumping into the wall

People who've been through our educational system, they think they're thinking, when they're just repeating like parrots.

Every war results from the struggle for markets and spheres of influence, and every war is sold to the public by professional liars and totally sincere religious maniacs, as a Holy Crusade to save God and Goodness from Satan and Evil.

I have never experienced another human being. I have experienced my impressions of them.