(Khayal). Imagination indicates a reality that becomes manifest in three different places. Firstly, the Khayal is manifest within the cosmos where existence is the same as imagination. Secondly, the Khayal is manifest within the macrocosm where the isthmus between the spiritual and corporeal worlds is imaginal. Thirdly, the khayal is manifest within the microcosm where the human self is the reality between the body and the spirit. Khayal is synonymous with images. The Realm of Imagination is the isthmus between the World of the Unseen and the Visible World and it is within this khayal that man is given the clearest expression of the 'He, not He' (Huwa, la Huwa) mystery of existence. The human faculty of imagination (khayal) is purely passive with regard to the active conjectural faculty of illusion and with regard to the Spirit which may imprint upon it heralding visions.
('Aql). The intellect or the faculty of reason. The word 'aql derives from 'iqal which means fetter. The intellect fetters man and it also puts its hooks into him, preventing him from making the final stages of the ascent. On the ascension to Allah (mi'raj) there is a point which is indicated by the term 'The Lote tree of the Uttermost Boundary'. It marks the 'place' where reason (the fetter) must be left behind. From this point onwards the traveller journeys with passionate love, yearning and bewilderment. On the Ascension of the Holy Prophet Muhammad (May the Salutations of Allah be upon him and Peace) it was at the Lote tree of the Uttermost Boundary that his companion, the Archangel Gabriel (Peace be upon him) stopped through fear of being annihilated. This station of fear is the highest point to which the intellect can attain.
(Ta'ayyun thani). The Second Entification or Second Epiphany. This is the Angelic Realm and is also known as the Imagination. The Lote Tree of the Uttermost Boundary, the Breath of the All Merciful and the Cloud. This is the Supreme Isthmus.