“It may seem as if Kant was content with such a radically dualistic view of human action, but ultimately he was not. … What Kant is assuming here is that morality is not just a matter of making rightful or virtuous choices, but also requires us to put those choices into practice by attempting to realize the goals or ends that they entail in the arena of action, that is, nothing less than the realm of spatial, temporal, and causal nature in which we live and act.”