Stage 1 Wicca and the like, all white and fluffy doing nothing but good learning the rules and basic spells, cat naming etc.
Stage 2 Grey Witchcraft, after many years of study you have now found yourself hitting a brick wall and want to learn more but don’t know where to go, so you cross the white line into the grey.
Stage 3 The Dark Side, crossing the line into the grey has opened your eyes, you now realise that there is so much more to learn and now you want to learn the black arts.
Stage 4 True Witchcraft, having practiced both white and black magic you now truly understand balance and see the craft in its entirety, you also see the natural world as nature intended.