Imamate and guardianship is considered as of Shiite`s most fundamental beliefs always defended by reasonable proofs of them. Molla Sadra is regarded among those great scholars; using his philosophical principles, he has tried to show how Divine friend or perfect man may be alive in visible world for ever. He has explained the unity of perfect man and the world of intellect. For him, intellectual world is before others and, therefore, through it Divine grace pass to others. God is the only main cause of created worlds including natural world in creation and duration both. This paper has intended to explain the continuation of guardianship on the earth.