مَّن ذَا الَّذِي يُقْرِضُ اللَّهَ قَرْضًا حَسَنًا فَيُضَاعِفَهُ لَهُ وَلَهُ أَجْرٌ كَرِيمٌ

While Islam was still unfamiliar, accepting it meant putting oneself through a great trial. At that time, the truth of Islam was veiled in doubt. Spending for Islam at that time was like giving a loan to somebody with flimsy hopes of getting any return. The atmosphere was pervaded by doubt and hesitation. As compared to the promises of God, the benefits right before people appear more certain to them. Under these circumstances, surrendering one’s life and property for the cause of Islam requires a very strong decision-making ability. At such a time, only one who has the capacity to recognise the reality of things through wisdom and insight, has the courage to progress in the right direction. For those who prove to have this insight in the world, it will become easy on the Day of Judgement; by making use of their insight, they will be able to pass more easily through the difficult stages there. The insight which had become their guide in this world will, by the grace of God, serve as a guide also in the Hereafter.

— Source: Tazkirul Quran (Maulana Wahiduddin Khan) via Quran.com (57:11)