God has promised those who believe and do righteous deeds that He will make them successors on earth. And He will indeed establish their religion for them, the religion which He has chosen for them and is pleased with. A verse of the Quran about the event of Al-Ghadir makes it clear that this religion is the religion of Ahl al-Bayt (the Household of Prophet Muhammad). Imam Mahdi will make Islam prevail over all religions. At this time, God will remove all fears and worries. And everyone will be able to reach the purpose of creation and become God’s deputy. Such believers will worship God without associating anything with Him. So people soon become like their Master and their Lord.