This reply to a question from a 3rd grader is from Matthew Heyd, Rector of The Church of Heavenly Rest:
This is a tough question! Christian theologians (like St. Thomas Aquinas) tried to answer “who created God” by suggesting that God was the “first cause”– the un-caused, un-created Being who brings everything else into creation. God is the first domino in the long line, or the artist who not only paints the painting but creates from scratch the paints, the canvas, and the brushes. God is un-created because the whole idea of what creation is comes from God. Psalm 90 says, “Before the mountains were brought forth/ or ever you had formed the earth and the world/ from everlasting to everlasting you are God.”
I think Thomas Aquinas’ “uncreated creator” answer is un-satisfying. My own answer is, I don’t know the answer. There are some parts of our faith that are a mystery…and this one is a mystery to me. Psalm 90 says it better, I think. Mystery is better explored through poetry than through logical analysis. What’s important to my own faith is, God created each of us in love. There is nothing bigger than God’s love. That I know.