Authors:

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.

Jim Butcher (2004). “Blood Rites: Book six of The Dresden Files”, p.136, Penguin
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