This is as clear as it gets in describing how I approach a doctrine of creation; of course, it comes
as a description of Karl Barth’s own understanding of creation within God’s economy of things. In case you weren’t aware Dutch Reformed theologian G.C. Berkouwer wrote a summary and critique (book length) of Barth’s theology, years ago, before Barth’s Church Dogmatics had been translated into English. I take this description of Barth’s doctrine of creation from Berkouwer’s description.
When Barth speaks of creation he does not have in mind an act of God which can in and by itself be a subject of theological reflection. The reason for this is that in his view creation is indissolubly related to the covenant of grace in Jesus Christ. It is not possible to speak of a natural theology with an independent cosmological interest in “God as Creator.”