Obviously, Gnosticism and Sufism are the most important areas in the field of classic literature of Iran in which there is an inner movement towards its original source that is close to God. In the course of movement, the follower encounters a lot of problems that sometimes take him away from the main goal. Sufism sheikhs recommended steady "remembrance" to their followers so that they could rescue themselves from forgetfulness and ignorance and arrive at the destination being helped by his leader. Remembering has had special ceremonies. Doing them under the supervision of sheikh, the follower has recited remembrance. In this paper, while introducing Gnosticism and Sufism in Islam briefly, we have dealt with the place of remembrance, its ceremonies, its ranks, the most important remembrance etc. in Sufism literature. Moreover, we have analyzed the points of view of some Sufism pioneers and sheikhs concerning remembrance.