Overall meaning : The Almighty states that when the clear Qur’anic verses of the Qur’an testifying to the truth are recited to the idolaters, those who do not believe in resurrection say to the Messenger, may Allah bless him and grant him peace, 'Bring us a Qur’an in which we do not find what we loathe, or change it to suit our wishes.’ In response to this, Allah directs him to say to them: It is not for me to change it of my own accord. I follow nothing except what Allah reveals to me. I fear, were I to disobey my Lord, the punishment of a dreadful day (that is, the Day of Judgement).
He also directs him to say to them: Had Allah pleased, I would never have recited the Qur’an to you, nor would Allah have brought it to your knowledge. I spent a whole lifetime among you before this Qur’an was revealed to me [and you know that I have never lied to you and that I neither read nor write]. Will you not then use your intellect and realise it is from Allah?
No one is more wicked and does greater wrong than those who invent a falsehood about Allah or deny and disbelieve His revelations. Surely the unbelievers will never succeed.