Religious doubt, which is transient, emerges without intention, causes guilty feelings and is not desired by the faithful. This doubt is different from denial doubt or skeptical doubt. In improving the faith and trying to have a concious faith, religious doubt should be benefitted. A faithful shouldn?t maintain religious faith conciously after it emerges unwillingly and should try to find ways out of it. Both Qur?an and the Prophet Mohammad?s hadiths explain that religious doubt is a fact and explains how to cope with the matter.