Revelation is one of the pillars of prophecy and the only means of the Infallible to transmit religion to humanity. However, a group has sought to negate this intera-religious issue or reduce it to an inner experience and general inspiration. Mulla Sadra’s statements prove the point that man by himself is not able to develop theoretical and practical intellect, implement individual and social justice, and manage the spiritual dimension and the worldly life; thus, Allah, the Almighty, should assist the man so that he can arrive at a conclusion in the sciences, teachings, realities, and management of attachment, and this is possible through revelation. Furthermore, the explanation of the truth of revelation from Mulla Sadra’s viewpoint shows that revelation and Gabriel are not restricted to an intellectual truth which cannot be reduced; rather, but Gabriel experiences an ideal reduction while he maintains his intellectual rank, and the Prophet also sees the angel of revelation with his own eyes and hears revelation with his own ears. This explanation of the revelation opens the way for understanding many Quranic verses and hadiths.