To teach how to live without certainty and yet without being paralysed by hesitation is perhaps the chief thing that philosophy, in our age, can do for those who study it.

It is possible that mankind is on the threshold of a golden age but, if so, it will be necessary first to slay the dragon that guards the door, and this dragon is religion.

Admiration of the proletariat, like that of dams, power stations, and aeroplanes, is part of the ideology of the machine age.

Ethics is in origin the art of recommending to others the sacrifices required for cooperation with oneself.

Man needs, for his happiness, not only the enjoyment of this or that, but hope and enterprise and change.