﴿ أَفَمَن شَرَحَ ٱللَّهُ صَدْرَهُۥ لِلْإِسْلَٰمِ فَهُوَ عَلَىٰ نُورٍۢ مِّن رَّبِّهِۦ ۚ فَوَيْلٌۭ لِّلْقَٰسِيَةِ قُلُوبُهُم مِّن ذِكْرِ ٱللَّهِ ۚ أُو۟لَٰٓئِكَ فِى ضَلَٰلٍۢ مُّبِينٍ ﴾

“Could, then, one whose bosom God has opened wide with willingness towards self-surrender unto Him, so that he is illumined by a light [that flows] from his Sustainer, [be likened to the blind and deaf of heart]? Woe, then, unto those whose hearts are hardened against all remembrance of God! They are most obviously lost in error!”

Is he whose breast God has opened to Islam and becomes guided so that he follows a light from his Lord …? like he whose heart He has sealed with disbelief? — this understanding of the ellipsis is indicated by what follows. So woe — an expression indicating ‘chastisement’ — to those whose hearts have been hardened against the remembrance of God that is hardened against the acceptance of the Qur’ān. Such are in manifest error.