The declaration of truth for which a prophet of God makes his appearance is the most serious reality of this world. But the prophet announces this reality only in the form of reasoning. The real believers are those who recognise the truth at a rational level and surrender themselves to it. When a group conclusively proves that it is not capable of recognising the Truth in the form of reasoning, God reveals the Truth in the form of a blast (saihah). The Truth becomes such a loud roar that nobody has the strength to face it. But, when this stage is reached, i.e. when Truth appears in the shape of the roar, it is the hour of retribution and not an opportunity for the acceptance of the Truth. All that is left for man to do then, is to repent and pay for his foolishness for all eternity. For, despite seeing, he was blind, and despite hearing, he was dumb to the voice of Truth.