وَلَمْ يُكَلِّفْهُمُ اللَّهُ تَعَالَى إِلَّا مَا يُطِيقُونَ
Allah Most High only obliges His servants to do what they can bear.
لَا حَوْلَ وَلَا قُوَّةَ إِلَّا بِاللَّهِ
There is no power to turn away from sin nor strength to establish obedience except through Allah.
This is not a denial of human choice. It acknowledges the true source of strength: enabling for obedience and protection from disobedience come through Allah's help.