"It is possible that mankind is on the threshold of a golden age; but, if so, it will be necessary to kill off nine-tenths of the present population."

"There is one very serious defect to my mind in Christ's moral character, and that is that He believed in hell. I do not myself feel that any person who is really profoundly humane can believe in everl…"

"I hate the world and almost all the people in it."

"One of the painful things about our time is that those who feel certainty are stupid, and those with any imagination and understanding are filled with doubt and indecision."

"The secret of happiness is to face the fact that the world is horrible, horrible, horrible."