Whereas the questioning in grave will make a believer happy, as it will herald an era of eternal happiness for him, the same questioning will for the faithless turn out to be the start of misfortune and torture. The very arrival of angels will terrorize the unbelievers. It is mentioned in narrations that the frightening angels will threaten the infidels in a terribly harsh tone. Flames will be leaping out from their eyes. Their hair will be very long, dragging on the ground. These are the angels who will approach the unbeliever and this is why they are named 'Munkar and Nakeer' (the abhorring ones).
The Disbeliever will Fail to Reply all Questions
A man who had passed his entire life without any thought of God and who never cared to know his Lord Creator. It can be well imagined what he will face. He will be asked about his God. But he had worshipped (was mad after) only money and wealth. He was devoted only to name and fame. He only longed for power. He had nothing to do with the Lord of the worlds. So he will tremble and shiver in such a way that he will not be able to reply any question. Some of such fellows will reply rightly about God but they will fail to reply regarding the Holy Prophet. Some will be unable to reply rightly about all the true beliefs. Some who will reply rightly about beliefs will fail in the questioning about their deeds and actions.
source : http://www.maaref-foundation.com
