The antidote to exhaustion may not be rest. It may be wholeheartedness. You are so exhausted because all of the things you are doing are just busyness. There's a central core of wholeheartedness totally missing from what you're doing.
David Steindl-RastEach string of a wind harp responds with a different note to the same breeze. What activity makes you personally resonate most strongly, most deeply?
David Steindl-Rast