I am not interested in proofs. I am only interested on how Nature works P.A.M. Dirac One hundred years after its creator's birth, the Dirac equation stands as the cornerstone of XXth Century physics. But it is much more, as it carries the seeds of supersymmetry. Dirac also invented the light-cone, or " front form " dynamics, which plays a crucial role in string theory and in elucidating the fin...