The Prophet's Emotional Struggle

وَلَقَدْ نَعْلَمُ أَنَّكَ يَضِيقُ صَدْرُكَ بِمَا يَقُولُونَ

And We already know that your breast is constrained by what they say.

لَعَلَّكَ بَـٰخِعٌ نَّفْسَكَ أَلَّا يَكُونُوا۟ مُؤْمِنِينَ

Perhaps, [O Muḥammad], you would kill yourself with grief that they will not be believers.