Humanism, Psychology, Will to Power

The introduction of Psychology as a Philosophical method in a work entitled Human, All Too Human entails a concept of Soul that is not Supernatural.  Thus, insofar as the Supernatural realm is conceived as consisting in Eternal Life, the positing of a Will to Life as the fundamental Psychological principle fails to decisively humanize the concept, a problem which unnecessarily complicates Spinoza's exposition in Part V of the Ethics. Instead, it is Nietzsche's later proposal, that the Will to Power is the fundamental Psychological principle, that is appropriately Humanist, since it entails change, which Eternity precludes.