Quote from : Letters and Papers from Prison Book

Barth was the first theologian to begin the criticism of religion...but he set in its place the positivist doctrine of revelation which says in effect, 'Take it or leave it': Virgin Birth, Trinity or anything else, everything which is an equally significant and necessary part of the whole, which latter has to be swallowed as a whole or not at all. That is not in accordance with the Bible. There are degrees of perception and degrees of significance, i.e. a secret discipline must be re-established whereby the of the Christian faith are preserved from profanation.