If it is said: Why the Almighty Allah did not prevent his killing with the help of angels and other unseen means? The reply is that the prevention of his killing by the Almighty Allah is of two kinds: One is that this obstacle should either be in negation of religious duties or not opposed to it. And that obstacle, which is not opposed to religious duties, is that opposition to Imam (a.s) should be prohibited; his obedience and following should be ordered and help should be rendered to him and to say that it is obligatory for people to obey him. All these commands and prohibitions are also issued by Almighty Allah, but becoming an obstacle by Allah for one who intends to kill the Imam is opposed to religious duties and logical contradictions appear in it. It is so, because religious duties are aimed at earning divine rewards, but Allah’s being an obstacle is opposed to this and on many occasions, compulsive prevention by the Almighty Allah may have some evil for the people, which in fact cannot be expected from Allah. One of our senior scholars said that the instance of malaise in the reappearance of the Imam and the instance of exigency in his occultation is not impossible and improbable; on the contrary it is very much possible. But this statement is not correct, because from this statement, the obligatoriness of messengership would become invalid [that is if this is accepted, it would be right to say that the