In the midst of a conversation about scientific dogmatics and the necessity of it focusing on and agreeing only with revelation, is this little gem (and forgive dear Karl his gendered language - he was a man of his times):
"Now it is obvious that everyone who works at dogmatics works more or less with specific intellectual presuppositions. The only question is whether in addition to these he also knows the sign of the divine promise which is set up in the Church and whether he is able and willing, in a way that admits of no proof, to take this sign so seriously that in this context its direction takes absolute precedence over all the directions he might owe to the humanities. If and so far as this is so, his work is scientific, and if and so far as it is not so, his work is not scientific, no matter how scientific it may be considered from other angles. It is quite right—and we are not questioning this here but emphatically underlining it—that an education in the arts and a familiarity with the thinking of the philosopher, psychologist, historian, aesthetician, etc., should be demanded of the dogmatician or the theologian. The dogmatician, too, must think and speak in a particular age and should thus be a man of his age, which also means a man of the past that constitutes his age, i.e., an educated man. Nevertheless, the only element in education that makes him a dogmatician is the one which is not provided in all these other disciplines and which consists in indemonstrable and unassuming attention to the sign of Holy Scripture around which the Church gathers and continually becomes the Church. By this attention, and by nothing else, the theologian becomes a theologian."
Karl Barth, Geoffrey William Bromiley, and Thomas F. Torrance, Church Dogmatics: The Doctrine of the Word of God, Part 1, vol. 1 (London; New York: T&T Clark, 2004), 283–284.