The Principle of Relativity

Extract

The question of “relativity” is much to the front at the present day, and the methods of viewing it may be divided, very roughly, into three classes:—

1.The relativity of space, time, motion, etc. Nothing being absolute— everything relative to something else. This view is very old (it certainly dates back as far as the time of Aristotle), and nearly everybody believes it; although there are still a few people who would like to believe in absolute motion, space, or rest. Even truth, however, is really “relative” ; and this was, apparently, Pilate's view when he scornfully asked, “What is truth?”