The numerical side of the theory of relativity is derived from the failure of all attempts to detect the relative motion of matter and ether. - Herbert Dingle

The aim of the scientist is to express, in as simple a statement as possible, the principles underlying the order and arrangement of phenomena.

Between the Charybdis of inaccuracy and the Scylla of abstruseness, the course is narrow and the sea is rough.

A ray of light, passing close to a heavy body, should, on Einstein's assumption, suffer a slight chance of direction, as if it were pulled towards the body. According to Newton's principles, there seems to be no reason why the light should be bent at all. It is possible, however, that light possesses the equivalent of weight in a material body, and, if so, the gravitational force should cause a bending similar to that predicted by the theory of relativity, but of only half the amount.