As a leader, you may imagine that constant diligence, and the appearance of working harder than anyone else, signify power. Actually though, they have the opposite effect - They imply weakness. Why are you working so hard? Perhaps you are incompetent and have to put an extra effort just to keep up. Perhaps you are one of those people who do not know how to delegate and have to meddle in everything.
The truly powerful, on the other hand, seem never to be in a hurry or overburdened. While others work their fingers to the bone, they take their leisure. They know how to find the right people to put in the effort while they save their energy and keep their hands out of the fire.
Similarly, you may believe that by taking on the dirty work yourself, involving yourself directly in unpleasant actions, you impost your power and instill fear. In fact, you make yourself look ugly and abusive of your high position. Truly powerful people keep their hands clean. Only good things surround them, and the only announcement they make are of glorious achievements.