All is created by the Almighty and in subjection to Him. There is no contest here. The adversary's job is to tempt man and then accuse him before the Almighty when man fails. The adversary has no power other than the power he is given by man. Yes, when man creates a negative reality we become weak and operate at a much lower frequency. Our reality is then far below the potential that we were given. A positive relationship with our Creator taps into the higher frequency of love meant for our benefit.