Postulate of God........Lonesh

"All attempts to employ reason in theology in any way merely speculative manner are altogether fruitless and by their very nature null and void…the only theology of reason which is possible is that which is based upon moral laws"

The postulate of God is based on the moral proof rather than the theoretical proof. The idea of God should originate in our reason. God, which Kant proposes as postulate is not the God of religion. The postulate of God has origin in our own reason. It would necessarily mean that submitting to will of God is submitting to one's own reason. It is not religious dogmas to which one has to submit oneself but it's to one's own reason.

The need of God arises because the relationship between moral law and happiness is not guaranteed and realized in this world. So here God comes to the rescue and thus necessitates the compatibility of virtue and realization of highest good. This is the reason why the postulate of God comes into picture. And in this wise, benevolent and powerful God the ideal results of morality will become actualised. Here God turns out to be 'the highest good'.

Our obligation to obey the moral law should not be based on the assumption of the existence of God. It is a moral necessity to assume the existence of God. The postulate of God is a need or requirement of our moral consciousness or a moral necessity. And this moral necessity is subjective and not objective which means that it is not itself a duty. The postulate of God is in no way connected to the consciousness of our duty. The divine will is the motive to action, and not ground of it. Kant stresses that the properties of Omnipotence, Omniscience and Omnipresence can be assigned to God to play his moral role of guaranteeing the possibility of the highest good.  And these have no basis for assigning any other properties to God.  In each of the three critiques Kant would even say that I must not even say 'it is morally certain that there is God.' But rather 'I am morally certain.' God is not a metaphysical concept, original being, first cause not blindly working eternal root of all things. It functions in the thinking of a moral agent and exercise a real influence on his/her actions.