In this case it would be better for Muhammad to follow like Paul to create his own life story in the Qur'an. There is no need for him to say the greatness of God, or the life of Jesus, Moses and other prophets.
SAM, SAM SAM....
You should read what Paul actually taught, and not some Muslim polemic about him. He certainly did not "create his own life story..."
And if you have an interest in any texts of the gospels, I would discuss them with you. But it is obvious that is not the case. Mohammed is not in John's gospel, nor in any NT text, nor in any HB text. It is silly to suggest otherwise, and you have agreed with me on that.
Whatever else you believe about the gospel of John, is off topic.
And you should pay close attention to the teachings of the Qur'an to see what it really is. Compare it with the original texts, its sources. The results will speak loud and clear to you, unless you are too full of self-importance to listen to your own reason. Mohammed recast a number of biblical characters in a certain way. His version varies from the original accounts, often by error, but also sometimes by design. Look at the Islamic Abraham, for example... can you not see the similarities to his own life which Mohammed introduced ? The revised version of Ishmael? All of these serve a purpose. Why did Mohammed reject the crucifixion and resurrection accounts, the central point of Christianity? Simple, if there were true, the Mohammed would be superfluous. Why did he retell, in some way, some biblical stories at all? At various points he wanted to win converts from Christians and Jews. He even changed the Qibla for that reason. Later in life, he gave up on that, so the Qibla went to Mecca, Mohammed's home. If you look at the late surahs then you see the spiritual bankruptcy of Mohammed as clear as day: the hate, the violence he demands, the repetitions, the thinly veiled anger against all and any who do not accept him, all this is not the mind of a man of God. He is deceiving you, SAM, and it is time you wised up to that.
The crassest examples are when Mohammed says Allah commands Mohammed to tell his followers how to behave in his house, how not to ask questions or how "Allah" threatens Mohammed's wives with starvation unless they behave.
Mohammed does not glorify God, he USES "Allah", just as he uses the stories of old from the bible. Allah is less a god, more a servant of Mohammed who "hastens to do his will" as Aisha acutely observed.
He had no real beliefs of his own, but he realised that he could manipulate people by masquerading as a religious leader.