Sidelights on Relativity collects two of Einstein’s finest short lectures: ‘Ether and the Theory of Relativity,’ rehabilitating the ether as spacetime structure, and ‘Geometry and Experience,’ with its immortal aphorism — as far as the laws of mathematics refer to reality, they are not certain; and as far as they are certain, they do not refer to reality.
An hour’s reading, and among the deepest things Einstein ever addressed to a general audience. Download the free EPUB for relativity’s philosophy straight from its author.