Islam was needed because earlier religions were incomplete and their teachings had been corrupted over time. Islam is a comprehensive religion that perfected and completed the teachings of previous prophets. It restored the true nobility of prophets by removing sins that had been falsely attributed to them. Additionally, the teachings of earlier revelations were specific to certain people and times, whereas the Quran provided universal teachings. There were also prophecies by previous prophets, including Jesus, that foretold the coming of the final prophet Muhammad and the religion of Islam.