(Dhat). The Essence. This is Allah in Himself without regard to His creations, His Attributes or His Names. The Essence is beyond knowledge or conceptualization. Allah warns us of this aspect of Himself. The Essence is Absolute Blindness, the Hidden of the Hidden, the Unknown of the Unknown. This is the World of Absolute Non-manifestation.
(An Ni'mah).The Grace of Allah. His Grace is an aspect of His Mercy. Ultimately, every spiritual experience, every unveiling, every tasting, every drinking and every quenching is through the Divine Grace. Without Allah's Grace man can do nothing.
(Al Hadarat al Dhatiyyah). The Presence of the Essence is the Absolute Unknowableness, Sheer Being, Pure Ipseity, the Unknown of the Unknown. This is the Presence of the Mother of the Book. Below it, in the Presence of the All-Compelling, the Mother of the Book becomes the Inscribed Book (al Kitab al Mastur), in that it appears as chapters.
(Tajalli ghayb). This is the Self-disclosure of the Essence within Itself. Here is 'where' the Absolute reveals Itself to Itself. This is the First Appearance of the Self-consciousness of the Absolute. This Self-disclosure of the Absolute is also called The Most Holy Emanation.
(Ghayb). The Mystery or the Non-Manifested or the Unseen. The Unknowable or the Mystery of Mysteries. The hadith, "Nothing is like Him" refers to al ghayb. It is His Incomparability. It is all that is beyond reach of our vision. Al ghayb is all that Allah veils from you because of you, not because of Him. To attain to 'The Unseen', the slave and lover is told, 'Leave aside your self and come!' And, when he obeys, it is Allah Who Sees Allah.
(Al Muhaqqiqun). These great ones form the highest category of friends of Allah. They follow no one's authority because in themselves they have verified and realized [through unveiling and finding], the truth and reality of all things which is Allah, the Real. They are also known as'The People of Unveiling and Finding'.