Secret behind the Seal of Propagating Prophethood and Infallible Imam's Not Having This Position

According to the prevailing view of theologians, legislative prophets in all previous divine religions were succeeded by propagating ones who propagated, explained, and interpreted the Divine Law of their predecessor through the revelation which came to them. However, the declaration of seal of prophethood by the manifest religion of Islam not only ended legislative prophethood but also declared the end of propagating prophethood. The question that arises here is: what is the secret behind the seal of propagating prophethood?Several proofs have been offered in this regard. What we understand from the Quranic verses and Infallible Imam's traditions is that every kind of knowledge about religion which man needs until the Day of Resurrection was revealed to the Holy Prophet at the time of the revelation of the sacred law of Islam, which, due to its comprehensiveness, differs from all pervious sacred laws. Therefore, the seal of propagating prophethood was also declared because no need for new revelation and propagating prophets remained. Using a descriptive- analytical approach, the research relies on Quranic verses and Infallible Imam's traditions to support its argument.