Historical Review of the development of

According to teachings of religion, "TAHDIS" has the meaning of conversation between Allah's angels with the Prophet, or Imam or another person. This subject, since the time of the Prophet (praise and greeting from Allah to Mohammad and his descendants) has propounded and could be perceived as the source of their Knowledge. In the Islamic Society, the belief that after the Prophet, there was no access to Revelation, was seen as equivalent of abstainance to attain Divine Knowledge and all claims of Divine, or acquired Knowledge were seen as equivalent to Prophecy claim. Imams by using "TAHDIS" taught the Shii Community that it is possible for a person other than the Prophet to gain access to Revelation through other than usual ways. It is clear that the dimensions of this Subject gradually cought the attention of the Shiis and led to a Shii discourse on the Divine Knowledge of the Imams. It should be noted that this be life ecountered difficulties and dangers during the time of the Sadeghin (Imam Bagher and Imam Sadegh), and also had to be controlled so as not to fall into exageration.