You: Should we really obey God only out of love? And if so, who says that we should love him in the first place? I know that God tells us to love him, in some scripture supposed to have come from his hand he goes so far as to command us to love him, but that is no reason to do so? Should we love him because he makes the world a wonderful place? Because he brings justice? Because he's fun to be with? There are too many unknowns here, too many undefined terms. I suggest you try another tactic.