"Mathematics, rightly viewed, possesses not only truth, but supreme beauty — a beauty cold and austere, like that of sculpture, without appeal to any part of our weaker nature, without the gorgeous tra…"

"It is not uncommon for doctors to be asked by married couples of some years' standing for advice as to how to get children, and to find on examination that the couples have not known how to perform in…"

"In the ordinary man and woman there is a certain amount of active malevolence, both special ill will directed to particular enemies and general impersonal pleasure in the misfortunes of others. It is …"

"Fear is the main source of superstition, and one of the main sources of cruelty. To conquer fear is the beginning of wisdom."

"Nothing can penetrate the loneliness of the human heart except the highest intensity of the sort of love the religious teachers have preached."