 Although James held that all the soul’s powers were active, they were not so to the same degree: the will and its aptitudes were considered to be more active and thus “closer” to their actualization than those of the intellect; and the intellect and its aptitudes, in turn, were viewed as more active and closer to their actualization than those of the senses. Accordingly, James considered that the more active an aptitude or “inclining principle” was, the more causal power it had and the less causal input it required from other sources.