وَمِنَ ٱلنَّاسِ مَن يَعۡبُدُ ٱللَّهَ عَلَىٰ حَرۡفٖۖ فَإِنۡ أَصَابَهُۥ خَيۡرٌ ٱطۡمَأَنَّ بِهِۦۖ وَإِنۡ أَصَابَتۡهُ فِتۡنَةٌ ٱنقَلَبَ عَلَىٰ وَجۡهِهِۦ خَسِرَ ٱلدُّنۡيَا وَٱلۡأٓخِرَةَۚ ذَٰلِكَ هُوَ ٱلۡخُسۡرَانُ ٱلۡمُبِينُ
And among mankind is he who worships Allah as it were, upon the very edge (i.e. in doubt); if good befalls him, he is content therewith; but if a trial befalls him, he turns back on his face (i.e. reverts back to disbelief after embracing Islam). He loses both this world and the Hereafter. That is the evident loss.
يَدۡعُواْ مِن دُونِ ٱللَّهِ مَا لَا يَضُرُّهُۥ وَمَا لَا يَنفَعُهُۥۚ ذَٰلِكَ هُوَ ٱلضَّلَٰلُ ٱلۡبَعِيدُ
He calls besides Allah unto that which hurts him not, nor profits him. That is a straying far away.
يَدۡعُواْ لَمَن ضَرُّهُۥٓ أَقۡرَبُ مِن نَّفۡعِهِۦۚ لَبِئۡسَ ٱلۡمَوۡلَىٰ وَلَبِئۡسَ ٱلۡعَشِيرُ
He calls unto him whose harm is nearer than his profit; certainly, and evil Maula (patron) and certainly an evil friend!
إِنَّ ٱللَّهَ يُدۡخِلُ ٱلَّذِينَ ءَامَنُواْ وَعَمِلُواْ ٱلصَّـٰلِحَٰتِ جَنَّـٰتٖ تَجۡرِي مِن تَحۡتِهَا ٱلۡأَنۡهَٰرُۚ إِنَّ ٱللَّهَ يَفۡعَلُ مَا يُرِيدُ
Truly, Allah will admit those who believe (in Islamic Monotheism) and do righteous good deeds (according to the Quran and the Sunnah) to Gardens underneath which rivers flow (in Paradise). Verily, Allah does what He wills.