In the gigantic conceptions of Einstein, the velocity of light —186,300 miles per second — dominates the whole Theory of Relativity. He proves mathematically that the velocity of light is, so far as man’s finite mind is concerned, the only constant of a universe in flux. On the sole “absolute” of light velocity depend all human standards of time and space. Not abstractly eternal as hitherto considered, time and space are relative and finite factors. They derive their conditional measurement-validities only in reference to the yardstick of light velocity.
