The life of Job is a good example of what happens when we lose the clarity of our mind and subject ourselves to other powers - Job 3:25, "what I fear have come upon me". In the Spirit, there are "powers", an angel class; subjected to God and satan (his fallen angels) alike to do tasks that influence our decisions. When we allow these influences to direct our decisions, we essentially become the slave rather than the master of such spirits. Yes, the good angels are there for us and are ready to be commanded by the power that lives in us. Everything on earth and in the heavens are subjected to the power we have been given.
P = E/T.