Asked in 1919 whether it was true that only three people in the world understood the theory of general relativity, [Eddington] allegedly replied: ‘Who’s the third?

The physical world is entirely abstract and without actuality apart from its linkage to consciousness.

We have learnt that the exploration of the external world by the methods of physical science leads not to a concrete reality but to a shadow world of symbols, beneath which those methods are unadapted...

A star is drawing on some vast reservoir of energy by means unknown to us. This reservoir can scarcely be other than the subatomic energy which, it is known exists abundantly in all matter; we...

Let us begin with the fine-structure constant. … The fine-structure constant is really the ratio of two natural units or atoms of action. … We obtain action when we multiply energy by time. … We...

Whether in the intellectual pursuits of science or in the mystical pursuits of the spirit, the light beckons ahead, and the purpose surging in our nature responds.

The mind-stuff of the world is, of course, something more general than our individual conscious minds…. It is difficult for the matter-of-fact physicist to accept the view that the substratum of everything is of mental...