Nothing in the world is more flexible and yielding than water. Yet when it attacks the firm and the strong, none can withstand it, because they have no way to change it. So the flexible overcome the adamant, the yielding overcome the forceful. Everyone knows this, but no one can do it.
Power, from the standpoint of experience, is merely the relation that exists between the expression of someone's will and the execution of that will by others.
Thought is like a bubble rising to the surface. When thought is joined to will, we call it power. That which strikes the sick person whom you are trying to help is not thought, but power.