The present article presupposes that the writer-mystics have tried to prove the close relationship between mystical knowledge and Quran and the Tradition, facing the Muslim jurisprudents. After considering twenty mystical texts, the results shows that both of inner and personal motives (including divine inspiration, invocation of God, vowing, intercession and the like) and outer motives (such as guiding, giving an ultimatum to wicked, supporting the new mystic traveler, confronting the pretenders, insistence of followers, inability to understand Arabic books and so forth) have led the mystics to write the instructive books. The common tradition among mystics, as well as the insistence of followers provided situation necessary for mystics for receiving divine inspiration.