Epistemic essence for the continuation of Divine grace and the existence of Divine caliph

The belief of Divine caliph is the one supported by Quran, demonstrative proof and mysticism. The Prophet of Islam is the most distinct one among Divine caliphs to whom prophecy ended, though his various roles as Divine caliph mentioned in Quran, would never come to an end. The reason why lies in the fact that human societies and the world of creation respectively need continuous Divine laws and existential grace provided by the existence of Divine caliph. In the paper it has been explained that theology inspired by Quran, demonstrative proof and theosophy inspired by the problem of Divine grace have explained the necessity for the contiuous existence of Divine caliph under the title of pure Imam.