God is a Spirit, infinite, eternal, and unchangeable, in his being, wisdom, power, holiness, justice, goodness, and truth. WSC Q4 (emphasis mine)
That's how the Shorter Catechism answers "What is God?" The Westminster Confession has more to say but the focus is the same: a description of what amounts to "attributes" concluding with the Western formulation of the Trinity. None of these descriptions are wrong. I affirm them wholeheartedly. But should we start with attributes?
What are we describing when we begin with the "attributes of God"? Let me rephrase that: Who are we describing?
At first it's difficult to answer the question. If "what" is in view, we're probably describing God's "essence", His "substance" or "nature." It's of no small consequence that the possessive "his" or "God's" precedes this "what." But even so, we're left with "Who?"
Detectives do their best to determine whose body they've found before turning it over to the coroner for an autopsy. But here we are, giddy as we pick apart the parts of God long before we've stopped to consider Who God is...