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 wh… - Arthur Eddington

However closely we may associate thought with the physical machinery of the brain, the connection is dropped as irrelevant as soon as we consider the fundamental property of thought — that it may be correct or incorrect. … that involves recognising a domain of the other type of law — laws which ought to be kept, but may be broken.

I suppose that the applied mathematician whose theory had just passed one still more stringent test by observation ought not to feel satisfaction, but rather disappointment—"Foiled again! This time I had hoped to find a discordance which would throw light on the points where my model could be improved." ...I own that I have never felt very keenly a disappointment of this kind.

Our system of philosophy is itself on trial; it must stand or fall according as it is broad enough to find room for this experience as an element of life.