We had better dispense with the personification of evil, because it leads, all too easily, to the most dangerous kind of war: religious war.
Man has been driven out of the paradise in which he could trust his instincts.
I have found the missing link between the higher ape and civilized man; it is we.
We do not take humor seriously enough.
It is a good morning exercise for a research scientist to discard a pet hypothesis every day before breakfast. It keeps him young.
I believe that present day civilized man suffers from insufficient discharge of his aggressive drive