We call this state Operating Thetan or OT. To operate something is to be able to handle it. Thetan is from the Greek letter theta, the traditional philosophers symbol of thought, spirit or life. Thus it means a being who as a spirit alone can handle things.
The definition of the state of Operating Thetan is Knowing and willing cause over Life, Thought, Matter, Energy, Space and Time.
As man is basically good, despite his evil reactions to his reactive mind, a being who is Clear becomes willing to trust himself with such abilities. And in any case none can have more power than they can control.