Unlike the founders of many religions, the final prophet of Islam is a real documented and historical figure. He lived in the full light of history, and the most minute details of his life are known. Not only do Muslims have the complete text of God's words that were revealed to Muhammad, but they have also preserved his saying and teachings in what is called "hadith" literature. This having been said, it should be understood that Muslims believe that the Prophet Muhammad was only a man chosen by God, and that he is not divine in any way. In order to avoid the misguided wish to deify him, the Prophet Muhammad taught Muslims to refer to him as "God's Messenger and His Slave".
The mission of the last and final prophet of God was to simply teach that "there is nothing divine or worthy of being worshipped except for Almighty God", as well as being a living example of God's revelation. In simple terms, God sent the revelation to Muhammad, who in turn taught it, preached it, lived it and put it into practice. In this way, Muhammad was more than just a "prophet" in the sense of many of the Biblical prophets, since he was also a statesman and ruler. He was a man who lived a humble life in the service of God, and established an all-encompassing religion and way of life by showing what it means to be an ideal friend, husband, teacher, ruler, warrior and judge. For this reason, Muslims follow him not for his own sake, but in obedience to God, because Muhammad not only showed us how to deal with our fellow human beings, but more importantly, he showed us how to relate to and worship God, worship Him in the only way pleasing to Him.
Like other prophets, Muhammad faced a great deal of opposition and persecution during his mission. However, he was always patient and just, and he treated his enemies well. The results of his mission were very successful, and even though his mission started in one of the most backward and remotest places on earth, within a hundred years of the death of Muhammad, Islam had spread from Spain to China. The Prophet Muhammad was the greatest of all of God's prophets, not because he had new doctrines or greater miracles, but because the results of his mission have brought more human beings into the pure and proper belief in the One True God than any other prophet.