"Morality is herd instinct in the individual."

"Thinking evil is making evil."

"Battle not with monsters, lest ye become a monster, and if you gaze into the abyss, the abyss gazes also into you."

"In individuals, insanity is rare; but in groups, parties, nations, and epochs it is the rule."

"Life without music would be a mistake."

"The Christian resolution to find the world ugly and bad has made the world ugly and bad."

"Mankind must put an end to war, or war will put an end to mankind."

"If you leave the pool you have dug for yourself and go out into the river of life then life has an astonishing way of taking care of you, because then there is no taking care on your part."

"There is no right to strike against the public safety by anybody, anywhere, any time."

"'D'ya think the rain'll hurt the rhubarb?' 'Not if it's in cans.' 'What, the rain, or the rhubarb?..."

"Just as despair can come to one only from other human beings, hope, too, can be given to one only by other human beings."

"A specification that will not fit on one page of 8.5x11 inch paper cannot be understood."