Does Bonhoeffer speak about the “hierarchy of truths” elsewhere?

“Barth was the first theologian—to his great and lasting credit—to begin the critique of religion, but he then put in its place a positivist doctrine of revelation that says, in effect, “like it or lump it.” Whether it’s the virgin birth, the Trinity, or anything else, all are equally significant and necessary parts of the whole, which must be swallowed whole or not at all. That’s not biblical. There are degrees of cognition and degrees of significance (Es gibt Stufen der Erkenntnis und Stufen der Bedeutsamkeit).“ (DBWE8:373)