I once made a post about hanging out with cheerful, positive Christians in order to be more cheerful and positive, because a number of my atheist friends are also more negative and cynical. Someone commented that this verges on the Dark Arts. (Manipulating my own mind?) I've come to the conclusion that I can distinguish myself using Dark Arts from "regular social interaction" but I'm not going to stop doing it unless someone can prove that doing this harms others.