(Ijtima'). Allah, the Real is both Essence and Divinity. The Real, as Divinity, may come together with His creation. Allah descends and the slave ascends to meet within a mutual waystation. But such a 'coming together' is impossible for the Essence Itself, Which is Incomparable and Inaccessible.
(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.