God mad Man to be a creature of habit. When faced with a complex process, humans will always internalize the process until the can perform it on auto-pilot. It works this way with religious processes too. People develop habits of spirituality. Except we tend to call them tradiitons or rituals. These habits have a strong possiblity of taking over, so people need to be in continuual renewal so their relationship with God does not deteriorate into ritual motions.