OK its right that Einstein put all his efforts in developing the THEORY OF EVERYTHING , but that doesn't means he wasted his second half of his life in doing so !!! because some day and someone will complete the theory. Einstein cant be such a stupid to waste his time for nothing !!! But the thing i want to ask is what did the theory meant to do ? they say it was to unify the ELECTRODYNAMICS and GRAVITATION , but what does this "unify" word means (i am not asking the literal meaning but the scientific meaning ). Please explain !!!