> Besides, give me one piece of scientific evidence that can prove time actually = money It's a folk saying, not a mathematical equivalence or a physical law.

> Besides, give me one piece of scientific evidence that can prove time actually = money It's a folk saying, not a mathematical equivalence or a physical law. It describes opportunity cost in an intuitive, but non-rigorous, way. Assuming that there are a set of actions available to me which provide different forms and degrees of benefit to me, my time is most profitably spent on the actions that provide me the greatest benefit.