Rest when you're weary. Refresh and renew yourself, your body, your mind, your spirit. Then get back to work.
Without rest, a man cannot work; without work, the rest does not give you any benefit.
It is not work that kills men; it is worry. Work is healthy; you can hardly put more on a man than he can bear. But worry is rust upon the blade.
Sometimes the most urgent and vital thing you can possibly do is take a complete rest.
Man is so made that he can only find relaxation from one kind of labor by taking up another.