وَمَا آتَاكُمُ الرَّسُولُ فَخُذُوهُ وَمَا نَهَاكُمْ عَنْهُ فَانْتَهُوا
Take what the Messenger gives you, and abstain from what he forbids.
Take it directs acceptance of the Messenger’s commands, and abstain directs restraint from prohibitions. The practical result of doctrinal knowledge is to combine obedience with avoidance of wrongdoing.
The statement that whoever does an atom’s weight of good will see it—and the parallel warning about evil—establishes individual accountability. Neither minor good nor minor evil should be dismissed as outside the reckoning.