By studying and researching the verses of the holy Quran and the narration about the divine test and affliction, we can conclude that a more important goal other than knowing Allah is meant and that is the issue of raising and nurturing human beings. Therefore, by observing the verses about the test of servants in the world, we find that Allah has established the test as a general law and permanent tradition and its purpose is to blossom and nurture the latent human’s talents and bring human beings to the peak of perfection and humanity. Yes, the mankind must be as hard as a steel so that he gains more strength and resistance, if he is put in a hot furnace of earthly diseases and afflictions and his impurities should be removed and purified to the extent that he sees nothing but truth and hears nothing but truth and say nothing but truth and becomes a real purified servant of Allah Almighty.
source : erfan.ir