Commentary
The word as am hidayah (guidance) is used for several meanings. One meaning is to show the path, which does not necessarily mean that the one shown the path will reach his destination. Another meaning of hidayah is to make one reach his destination. According to first meaning of the word it is but obvious that the Holy Prophet ﷺ and all other prophets were guides, and that imparting guidance was within their control, because it was the obligation of their duty. If they did not have the control over imparting guidance, how could have they fulfilled their obligation? Therefore, the statement made in this verse that he did not have control over guidance, relate to the second meaning of this word that is to make one reach his destination. It means that it was not his duty or obligation to put faith in one's heart in order to make him convert to Islam by his teachings and preaching. This is in the control of Allah Ta` ala only. The meaning and types of hidayah have already been discussed in detail under Surah Al-Baqarah.
Sahih Muslim has reported that this verse was revealed about the Holy Prophet ﷺ 's uncle, Abu Talib. It was his great desire that Abu Talib should accept the faith. It was for this desire that he was advised that it was not within his control to put faith in anybody's heart. It is observed in Ruh ul-Ma’ ani that one should abstain from discussing or passing judgment unnecessarily on the subject of acceptance of faith or otherwise by Abu Talib, because this may hurt the Holy Prophet ﷺ 's feelings for his natural love toward his uncle. (وَاللہُ سبحانَہُ و تعالیٰ اَعلَم)