The Prophet (peace be upon him) was sent to address people of every level, from ignorant seventh-century bedouins to those of the highest intellectual and scientific achievements, until the Day of Judgment. No one has yet been able to disprove what he said. Accordingly, after we scrutinize his Traditions and the Quran, we realize that they complement each other in style and content. Moreover, there is no contradiction between them and established scientific knowledge. Ever since the Revelation, billions of people have found in the Quran answers for their intellectual problems, cures for their spiritual diseases, and models for their behaviour in all circumstances.