The first principle of ethical power is Purpose. By purpose, I don't mean your objective or intention - something toward which you are always striving. Purpose is something bigger. It is the picture you have of yourself - the kind of person you want to be or the kind of life you want to lead.
I absolutely believe in the power of tithing and giving back. My own experience about all the blessings I've had in my life is that the more I give away, the more that comes back. That is the way life works, and that is the way energy works.