When a truth appears before a believer, he accepts it without any hesitation or reservation. When faced with a truth, a believer cannot afford to not acknowledge it. It is not possible for a believer to disregard the truth. A believer's faith compels him to surrender to the truth. When the call to prayer is given, a believer leaves aside every kind of work and bows down before God. When it's time for worship of God, a believer forgets his own business and turns himself wholly to God. It is not possible for a believer to not respond to God when He calls to him.