Sanity supposes patience, and a sense of limits. You can’t do everything at once. You would work and relax at the same time, but you can’t.
Knowing when you’re tired, and seriously responding, is important. Knowing too when it’s worth surmounting, or necessary to surmount, the desire to stop working, that matters too. But it’s true that there’s no rule here but feeling. It’s in you or it’s not. Sometimes there’s a push from you don’t know where; sometimes there’s not.
Life drags. And then suddenly speeds up. Flux and no more; back and forth, again and again; in infinite degrees.
Gray Haskins 