اَفَمَنْ كَانَ مُؤْمِنًا كَمَنْ كَانَ فَاسِقًاۗ لَا يَسْتَوٗنَ ( السجدة: ١٨ )
afaman
أَفَمَن
Then is one who
kāna
كَانَ
is
mu'minan
مُؤْمِنًا
a believer
kaman
كَمَن
like (him) who
kāna
كَانَ
is
fāsiqan
فَاسِقًاۚ
defiantly disobedient?
lā
لَّا
Not
yastawūna
يَسْتَوُۥنَ
they are equal
Afaman kaana mu'minan kaman kaana faasiqaa; laa yasta woon (as-Sajdah 32:18)
Sahih International:
Then is one who was a believer like one who was defiantly disobedient? They are not equal. (As-Sajdah [32] : 18)
1 Mufti Taqi Usmani
So, can one who is a believer become like one who is a sinner? They cannot become equal.