One problem with evolving into an Angel is that the human mind, deluded by the illusion that sense perceptible matter is all that there is to life, can pull the soul of a human backward in evolution to the animalistic path of the Seven Deadly Sins — the dark vices that kill, instead of the heavenly virtues that give life. Every thought, feeling, or deed either creates the wings of our evolving Angel-hood, or the horns of our devolving animal-hood.