Will power is nothing but another name of ego power. A man of wisdom has no will, just as he has no mind - because to will means to keep yourself separate from existence. It is a little subtle, but try to feel it. The moment you will it means you are always willing against things as they are. You want them to be some other way.
As much as you need a strong personality to build a business from scratch, you also must understand the art of delegation. I have to be good at helping people run the individual businesses, and I have to be willing to step back. The company must be set up so it can continue without me.