Christianity and Islam are the two largest religions in the world The two faiths share a common place of origin in the Middle East Christianity and Islam have different scriptures, with Christianity using the Bible and Islam using the Quran, though Muslims believe that both the Quran and the Christian Gospel, termed Injeel, were sent by God. Both texts offer an account of the life and works of Jesus. The belief in Jesus is a fundamental part of Islamic theology Both religions believe in the virgin birth of Jesus through Mary, but the Biblical and Islamic accounts differ.