Electrical force is defined as something which causes motion of electrical charge; an electrical charge is something which exerts electric force.

Human life is proverbially uncertain; few things are more certain than the solvency of a life-insurance company.

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?"

Philosophically, the notion of a beginning of the present order of Nature is repugnant to me ... I should like to find a genuine loophole.

When an investigator has developed a formula which gives a complete representation of the phenomena within a certain range, he may be prone to satisfaction. Would it not be wiser if he should say 'Foiled again! I can find out no more about Nature along this line.'

The idea of a universal mind or Logos would be, I think, a fairly plausible inference from the present state of scientific theory.

It is a primitive form of thought that things exist or do not exist.