They did not concretely determine what the good is in terms of archetypal movement of life. Just as Plato's the Good has no concrete content, so Kant's categorical imperative is merely a formal definition of morality. They did not determine the radical structure of the good and the evil in terms of life's impulse. The foundation of the metaphysics of moral can be established only through the elucidation of the structure of life. In other words, it is the determination of archetypal movement in accordance with the teleological nature of light, also the determination of the life's integration in the context of such archetypal movement contrasting between the destruction and the integration, Reason and the Self Kant's Reason resembles Jung's the Self.
Reason is the totality of the higher function of the mind, which holds guiding role of the mind.
In Jung, the Self is the totality of the archetypes in the collective unconscious, pursuing a guiding function for the ego to choose and judge the things in the world. Aristotle's form is also immanent in the individual and guides its becoming from inside the individual. Rational Religion Kant penetrates that Christ is the Idea. Kant insists that religion has to be based on the Idea. It is the Idea that human has to be at one with.