The origin of Islam is controversial. The "previous scriptures" are from the Hebrew Torah, the Psalms of David, and the Gospels of Jesus Christ (Sura 4:163; 5:44-48). The Qur'an accepts these books as divinely inspired and even encourages us to test its claims by these "previous scriptures." "If you have any doubt regarding what is revealed to you from your Lord, then ask those who read the previous scripture" (Sura 10:94). But this is where we run into a problem. The problem is that the Qur'an thoroughly contradicts the Torah, the Psalms, and the Gospels. For example, the Qur'an explicitly denies Jesus Christ's crucifixion (Sura 4:157-158) while all four Gospel accounts clearly portray Jesus Christ as crucified and resurrected.