Thus, by studying the various verses of the Holy Quran about the divine tests and examinations, we find out that Allah Almighty has decreed the divine test as a general law and a permanent tradition and its goal is to flourish and develop the latent talents of human beings and taking them the extreme development. Yes, the mankind should be as firm and persistent as steel so as to become pure after being under huge worldly diseases. Then he would see nothing but the truth and say nothing but the truth and becomes a real servant of Allah Almighty.
source : erfan.ir