Three Postulates of Immanuel Kant

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The three postulates namely freedom, God and Immortality though can’t be theoretically proven, is incorporated into the already coherent and meaningful ethical structure of Kant to give more practicability to his ethical theory taking into account the fact that man is not a purely rational being but a creature haunted by inclinations. Freedom, God and Immortality, the three postulates are not theoretical dogmas but are presuppositions having necessary practical reference. The introduction of postulate in Kant’s philosophy can be considered as an attempt to limit the theoretical and extend the practical so as to make them stand together. God as postulate by Kant is not the God of religion. This postulate of God has origin in one’s own reason which would necessarily mean that submitting to will of God is submitting to one’s own reason. The need of God arises because the relationship between moral law and happiness is not guaranteed in this world. So here God comes to the rescue and thus necessitates the compatibility of virtue and realization of highest good. The postulate of immortality is very much interwoven with the postulate of God. Taking into account the sensuous nature of human beings, Kant states that it is very difficult for a man to be righteous without hope. Immortality guarantees this hope and ensures that there is a place sufficient for the reckoning of happiness in proportion to worthiness to be happy. The postulate of freedom is given a special position among the other two postulates. Freedom is an apriori that we do not understand but we know it as the condition of the moral law which we do know. It is because of freedom that God and Immortality gain objective reality and legitimacy and subjective necessity. Freedom then can be considered as the keystone of the structure of pure reason. The postulates take us to the practical realm of Kant’s
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