Thinkers present different views on the reality of revelation and how it descents. Considering the great importance of this issue and several doubts which are sometimes attributed to mystics, the present paper tries to expound the issue by discussing the views of two Muslim mystics. The reality of revelation is, in fact, an essential manifestation of God on different degrees of existence, which is manifested appropriate to a certain degree and different from the other degrees. Therefore, this reality which had been manifested as an abstract and non-compound fact free from any composition, multiplicity, sound and utterance, was manifested as sound and utterance in the prophet's system of perception in the degree of nature. So, the utterances which flow on prophet's tongue are also God's act, and prophet's eye, ear and tongue are the means of manifestation of revelation, with no active role. A descriptive-analytical method is used in this paper.