Christian counselor and psychologist, and leading proponent of the rival "community model", Larry Crabb, states that Adams compares behavior patterns "with his understanding of biblical behavior patterns, and commands change". Crabb agrees with Adams that obedience to God's commands is "absolutely necessary for effective Christian living", but takes issue with what he sees as Adams' apparent belief that this is the "single key ingredient for spiritual growth". Crabb believes that this neglects what he refers to as the "'insides' of the behaving person", particularly "the person's assumption system and his evaluation of situations based on his assumptions".