“You still expect (deliverance) until Allah sends for this matter one, whom you do not know whether he is created or not.” These traditions are clear in referring to the twelfth imam (al-Mahdi) because there has not been any disagreement about the birth of any one of the other eleven imams or about their existence or inexistence besides that none of people has said that any of these eleven imams has disappeared or that seditions have occurred in religion during their periods or confusion has spread among people about the condition of those imams except this imam (al-Qa’im). Imam Abu Abdullah as-Sadiq (as) has declared that when saying: “If three names (of the imams); Muhammad, Ali and al-Hasan succeed, the fourth (imam) will be al-Qa’im.” The will of Allah has determined to make this imam disappear in order to try the people during this disappearance of the authority of Allah and to sift the pure ones, who submit to Allah by believing in His authority even if the authority is not among them and who believe that Allah will never leave the world without an authority even if the person of that authority is absent.