Who is God?

I have been reading Delighting in the Trinity by Michael Reeves. I will be reviewing it soon - it has been a wonderful help to me in so many ways. But I wanted to share one quote:

At bottom this God is different, for at bottom, He is not Creator, Ruler or even "God" in some abstract sense: He is the Father, loving and giving life to His Son in the fellowship of the Spirit....Having such a God happily changes everything.

For the first, I feel as if I am beginning to see how a trinitarian God changes everything, and how so much of what we see in the world around is simply the overflow of this wonderful truth about the Lord.