أَحَسِبَ ٱلنَّاسُ أَن يُتْرَكُوٓا أَن يَقُولُوٓا ءَامَنَّا وَهُمْ لَا يُفْتَنُونَ

The question of whether a man is a true believer is decided on the basis of how he conducts himself in extraordinary rather than in ordinary circumstances. It becomes clear, on such occasions through a man’s overt actions whether he is in actual fact what he claims to be. Those who prove to be steadfast in their belief and convictions under extraordinary circumstances, will be treated by God as believers in the true sense. To pass the divine test means to become a man of faith by adopting the way of sacrifice, that is to say, to accept and confirm the Truth when people in general reject it; to be staunch in one’s beliefs when people harbour doubts; to be a believer even at the cost of curbing one’s ego; to accept the Truth even when rejection of it does not entail any loss; to spend when restraint would appear to be more prudent; to be steadfast and firm when circumstances warrant fleeing; to surrender when the occasion demands that one save one’s skin; to bow down in submission when there is an occasion for arrogance; to support and co-operate when it amounts to surrendering and sacrificing everything. The inner man is revealed on such extraordinary occasions. Thereafter, no one is left with the opportunity to make fictitious claims about what in actual fact one is not.

— Source: Tazkirul Quran (Maulana Wahiduddin Khan) via Quran.com (29:2)