God’s essential attributes

God’s essence and attributes are identical.  Yet, in the Bible God comes down to our level and describes himself with attributes so we can understand him.  And so, for example, God tells us in the Bible that he is:  spirit (John 4:24), eternal (Psalm 90:2), all-powerful (Matthew 19:26; Luke 1:37), present everywhere (1 Kings 8:27), immutable (Psalm 102:26-27), all-knowing (Psalm 139:1-4), holy (Leviticus 11:45), and loving (1 John 4:8).

Dogmatics books, of course, treat your question with much, much greater thoroughness, but this very brief response summarizes some of what the Bible tells us about God.  In the Bible God reveals himself so we can know him in faith as our Creator, Redeemer and Sanctifier.