This paper deal with the study of MYSTICAL REVELATION and perception and its reliability in the words of God and the Impeccable, because REVELATION and perception have always been discussed in Islamic mysticism and that in general Islamic mysticism is based on REVELATION and perception of the invisible world. What is to be question is whether it is addressed in the holy Shariah or not, and if yes, how valuable it is. To this end, the two original resources , that is , the Koran and the impeccable's relations, are documented to find out the viewpoints of the Prophet and his successors, and whether these reverends have had any REVELATION or not, and if they did , how their REVELATION was different from non-impeccable's.This study concludes that REVELATION is of two types: surface REVELATION that pertains to inferior heaven, and spiritual REVELATION that relates to superior heaven. The divine saints and mystics can have access from surface REVELATION degrees to talent REVELATION and from spiritual one to mysterious REVELATION; but secret degree which is drowning into the eternity stage is exclusively bestowed to Muhammad the Prophet and the impeccable. Also, correct REVELATION pertains to the impeccable that is aligned with the divine Shariah. Therefore, the entire Muhammad REVELATION is the most comprehensive one available for human being.