To spend time is to pass it in a specified manner. To waste time is to expend it thoughtlessly or carelessly. We all have time to either spend or waste and it is our decision what to do with it. But once passed, it is gone forever.
Bruce LeePractice all movements slow and fast, soft and hard; the effectiveness of Jeet Kune-Do depends on split-second timing and reflexive action, which can be achieved only through repetitious practice.
Bruce Lee