We need to make a world in which fewer children are born, and in which we take better care of them.

The belief that there is only one truth and that oneself is in possession of it seems to me the deepest root of all evil that is in the world.

His [Erwin Schrödinger's] private life seemed strange to bourgeois people like ourselves. But all this does not matter. He was a most lovable person, independent, amusing, temperamental, kind and generous, and he had a most perfect and efficient brain.

Those who say that the study of science makes a man an atheist, must be rather silly people.

I am now convinced that theoretical physics is actually philosophy.

I believe that ideas such as absolute certitude, absolute exactness, final truth, etc. are figments of the imagination which should not be admissible in any field of science... This loosening of thinking seems to me to be the greatest blessing which modern science has given to us. For the belief in a single truth and in being the possessor thereof is the root cause of all evil in the world.

It is true that many scientists are not philosophically minded and have hitherto shown much skill and ingenuity but little wisdom.