أَفَمَنْ شَرَحَ اللَّهُ صَدْرَهُ لِلْإِسْلَامِ فَهُوَ عَلَى نُورٍ مِنْ رَبِّهِ
What of one whose breast Allah has opened to Islam, so that he stands upon light from his Lord? (Qurʾān 39:22)
The opening of the breast expresses the importance of guidance, receptivity to truth, and inward assurance. But the verse does not make every privately felt thought a rule of infallible knowledge. A claim to guidance must still be assessed in relation to sound evidence and established religious principles.
Acknowledging the light of guidance differs from accepting any person’s unverified claim to such light. The first expresses a recognized religious idea; the second adds a claim about a particular individual that calls for further examination.