So remind, [O Muhammad]; you are only a reminder.
You are not over them a controller. [Al Ghashiya:21-22]
The Prophet was reminded that he was a man who was sent by Allah to only warn and guide the people to the straight path, not one who could control them and make them believe. The characteristic of a Da’ee (one who calls to Allah) are mentioned here, we must remember that even if we do our best to convey not everyone will listen. We should not think that we can control a person once we have told them the truth. We are only using the Quran as a reminder.