Muhammad was not educated man (SHOCKING !!!)

Then the book will be given to the one who is illiterate, saying, "Please read this." And he will say, "I cannot read." (Isaiah 29:12 )

157. Those who follow the Messenger, the Unlettered Prophet, whom they find mentioned in the Torah and the Gospel in their possession. He directs them to righteousness, and deters them from evil, and allows for them all good things, and prohibits for them wickedness, and unloads the burdens and the shackles that are upon them. Those who believe in him, and respect him, and support him, and follow the light that came down with him—these are the successful.

158. Say, “O people, I am the Messenger of God to you all—He to whom belongs the kingdom of the heavens and the earth. There is no god but He. He gives life and causes death.” So believe in God and His Messenger, the Unlettered Prophet, who believes in God and His words. And follow him, that you may be guided. (QURAN: The Elevations/al-A'raf 7:157-158)


Note:Unlettered, illiterate or uneducated  

Why God made Muhammad that way? 

And you did not recite before it any scripture (previous scripture), nor did you inscribe one with your right hand. Otherwise the falsifiers would have had [cause for] doubt. (Quran-29:48)

Its proof that Muhammad never learn anything about the previous scriptures from any men becaused he unable to read and he's not copy anything from the previous scriptures.