A science in its infancy is the least satisfactory, and, at the same time, the most profitable theme for a general description. - Herbert Dingle

Matter, space, and time ... according to the relativist, are types of relations between events.

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.

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