The teachings of Quran and Hadith (sayings of Prophet Mohammad) revolves around two Arabic word namely, Emaan (Faith) and Amaal (Acts). Emaan is like the roots of a tree and Amaal are the stems, leaves or other parts of it. Just as without the roots, the tree cannot survive, similarly, without faith, the acts are useless. The teachings of Quran emphasize mostly on the beliefs and an overview the acts, whereas the Hadith explains both beliefs and acts in details. Muslims believe that although there may be reservations in the Hadith, but Quran is free from all the mistakes and is infallible. Quran is comprised of 114 Surahs (chapters) and 6236 Ayats (verses). Quran was preserved through writing and memorization. Undoubtedly, today Quran is the only book which is fully memorized by more than 10 million people all over the world. The teachings of Quran confirm the revelations of other books and scriptures on various prophets. But, at the same time, all these books are considered to be corrupted with time and do not contain the original script of God.
*Source: Minnesota State University