Love is another kind of power, which shouldn't surprise you. Magic comes from emotions, among other things. And when two people are together, in that intimacy, when they really, selflessly love each other it changes them both. It lingers on in the energy of their lives, even when they are apart.
Is there any real purpose in being alive if all we are going to do is get up every day and live only for ourselves? Live your life to help others. Give & live selflessly.