A person’s outward declaration and conduct may be observed, but the certain state of the heart belongs to Allah’s knowledge. Acting on outward evidence differs from claiming definitive knowledge of the inner state.
Wrongdoing or conduct resembling the signs of hypocrisy may be identified, but it does not confer certainty about the person’s heart. Nor may one declare a particular person destined for Paradise or Hell without authoritative grounds.
وَنَذَرُ سَرَائِرَهُمْ إِلَى اللَّهِ
We leave their inward secrets to Allah.