Einstein Defining Special Relativity

INSERT SHOT: Einstein’s notebook 1905—DAY 1: a theory that is based on two postulates (a) that the speed of light in all inertial frames is constant, independent of the source or observer. As in, the speed of light emitted from the truth is the same as that of a lie coming from the lamp of a face aglow with trust, and (b) the laws of physics are not changed in all inertial systems, which leads to the equivalence of mass and energy and of change in mass, dimension, and time; with increased velocity, space is compressed in the direction of the motion and time slows down. As when I look at Mileva, it’s as if I’ve been in a space ship traveling as close to the speed of light as possible, and when I return, years later, I’m younger than when I began the journey, but she’s grown older, less patient. Even a small amount of mass can be converted into enormous amounts of energy: I’ll whisper her name in her ear, and the blood flows like a mallet running across vibes. But another woman shoots me a flirting glance, and what was inseparable is now cleaved in two.