The Power of Choice explains why the witch or wizard is not altogether to blame when, especially, a believer fails to succeed. A lot is wrong with how you choose or the choice of what you say and do.
The author makes the point that the power to make your destiny come true is in your hand. And because you can indeed have the backing of Almighty God, nothing should be able to stop you making a success of your life. She leaves the big question squarely in your hand: Would you succeed? Do you really want to succeed? If yes, then you can!