﴿ ذَٰلِكَ مَبْلَغُهُم مِّنَ ٱلْعِلْمِ ۚ إِنَّ رَبَّكَ هُوَ أَعْلَمُ بِمَن ضَلَّ عَن سَبِيلِهِۦ وَهُوَ أَعْلَمُ بِمَنِ ٱهْتَدَىٰ ﴾

“which, to them, is the only thing worth knowing. Behold, thy Sustainer is fully aware as to who has strayed from His path, and fully aware is He as to who follows His guidance.”

That namely the desire of this world is the full extent of their knowledge that is the limit of their knowledge namely that they have preferred this life to that of the Hereafter. Truly your Lord knows best those who have strayed from His way and He knows best those who are rightly guided He has knowledge of both and will requite both.