The problem is not necessarily working hard, the problem is working so hard and long without rest that we begin to imagine that we’re the ones making everything happen. We begin to feel a growing, gnawing sense of responsibility and grandiosity about how important our work is and how we can’t stop because everything is on our shoulders. We forget that forces much larger than we are, in fact, do most of the work. 

Wayne Muller, A Time of Sacred Rest