To be the light out in the world (aka do magic) and to claim personal and worldly power, needs a casing that is bigger than the personality and the ego. It is not doing away with them, but they are no longer on the front line; they are a means of expression and interfacing with others.
You turn to the sacred as the sole holder of the support of the light, of the power, which it is, but you have the capacity as well.