It does not befit Allah to address any human being except by inspiration or from behind a veil, or He sends a messenger who then reveals by His permission whatever He wills. He is indeed Most High , All-Wise. ( Surat ash-Shura, 42:51)
Allah introduces Himself to us: Allah, the Creator of all the worlds and the sole Sovereign of the universe, is the Most High and the Possessor of the heavens, Earth, and everything in between. There is no deity but Him. High is He, Exalted above all that they associate (with Him). He is the Sovereign, the All-Powerful, and the Lord of the Ways of Ascent. Allah is Self-Sufficient, above all need.
All of the beautiful names belong to Allah, for He is the Owner of infinite beauty and infinite sublimity. A person can know Him only to the extent that He introduces Himself, and can appreciate Him through the verses of the Qur'an. In one verse, Allah describes this name in the following terms:
Allah, there is no deity but Him, the Living, the Self-Sustaining. He is not subject to drowsiness or sleep. Everything in the heavens and Earth belongs to Him. Who can intercede with Him except by His permission? He knows what is before them and what is behind them, but they cannot grasp any of His knowledge, except for what He wills. His Footstool encompasses the heavens and Earth, and their preservation does not tire Him. He is the Most High, the Magnificent. ( Surat al-Baqara, 2:255)