Having surveyed the Barthian criticism of a Schleiermacherian approach to faith, let’s flip it around. What concerns would liberal theology, privileging human experience as it does, raise about the Barthian emphasis upon Scripture and Tradition?
To make this case, let me call to the stand Dietrich Bonhoeffer.
Bonhoeffer’s story is intriguing. He encountered Barth early in his theological training, and Barth quickly became a decisive theological influence on him. This raised a few eyebrows among the liberal theologians who presided over the University of Berlin, where Bonhoeffer studied. Barth and Bonhoeffer were also allies in the Confessing Church movement, resisting the Nazification of the German national church.
But Bonhoeffer was to undergo a change. In Letters and Papers from Prison, written after his arrest for association with a group plotting the assassination of Hitler, a group that included his brother-in-law, Bonhoeffer voiced criticisms of Barth. These criticisms would come as a surprise to Barth when they were published after the war and Bonhoeffer’s death.
What were Bonhoeffer’s concerns about Barth?
As you likely know, in Letters and Papers from Prison Bonhoeffer was exploring with his dear friend Eberhard Bethge what he described as a “religionless Christianity” in “a world come of age.” What does Bonhoeffer mean by “a world come of age”? As he would explain to Bethge:Man has learnt to deal with himself in all questions of importance without recourse to the "working hypothesis" called "God." In questions of science, art, and ethics this has become an understood thing at which one now hardly dares to tilt. But for the last hundred years or so it has also become increasingly true of religious questions; it is becoming evident that everything gets along without "God"--and, in fact, just as well as before. As in the scientific field, so in human affairs generally, "God" is being pushed more and more out of life, losing more and more ground...
This development would lead Bonhoeffer to reach the following conclusion: “We are moving toward a completely religionless time; people as they are now simply cannot be religious anymore.”
Personally, I think Bonhoeffer was wrong about this. I think he would have been surprised, here in 2026, by how enduring the religious instinct has been in the West. Still, since World War II, religious belief and affiliation have experienced a sharp decline, to the point of collapse in parts of Europe. So Bonhoeffer was rightly worried about the plausibility of the gospel’s claims in a post-Christian context. And it is here where Bonhoeffer expresses concerns about Barth’s talk of the “Wholly Other” God.
Again, recall that Barth was worried about God becoming “captured” by human experience. To protect God from this capture, and thereby preserve the prophetic capacity of God’s Word, Barth defended a radical separation between God and human experience. Barth felt that policing this contrast was the only way to prevent idolatry, our chronic temptation to use God to justify ourselves personally, religiously, politically, and nationalistically. While this project is well-intended, Bonhoeffer began to worry that this radical distinction between God and the human would lead to God being experienced as alien and incomprehensible. A “Wholly Other” God, in relation to the human, would be, by definition, inhuman, unhuman, and antihuman.
The Barthian response here might be summarized like this: “Well, boo hoo for human experience. When God speaks, humans need to jump, no matter how alien that voice might sound.” To this, Bonhoeffer had the following to say in Letters and Papers from Prison:
Barth was the first theologian to begin the criticism of religion, and that remains his really great merit; but he put in its place a positivist doctrine of revelation which says, in effect, ‘Like it or lump it’: virgin birth, Trinity, or anything else; each is an equally significant and necessary part of the whole, which must simply be swallowed as a whole or not at all. That isn’t biblical. There are degrees of knowledge and degrees of significance; that means that a secret discipline must be restored whereby the mysteries of the Christian faith are protected against profanation. The positivism of revelation makes it too easy for itself, by setting up, as it does in the last analysis, a law of faith, and so mutilates what is — by Christ’s incarnation! — a gift for us. In the place of religion there now stands the church — that is in itself biblical — but the world is in some degree made to depend on itself and left to its own devices, and that’s the mistake.
By dismissing human experience, Bonhoeffer describes Barth’s theology as “positivistic.” That is to say, religious claims are presented to the human person as raw metaphysical propositions. As “wholly other” revelations, these propositions lack human resonance, appeal, or warmth. They are, rather, chilly, alien assertions, theological horse pills that one is forced to swallow.
Appealing to the incarnation, Bonhoeffer rejects theological positivism. God becomes human to make his appeal to humans in a human way. God embraces human experience as the very mode of his self-communication. Rather than being “Wholly Other” from the human, in Christ God’s Word is humanistic.
The point for the purposes of this series is this. While the world has not wholly “come of age” in a comprehensive and thoroughgoing renunciation of faith, we have entered a secular age. And in our post-Christian culture, the prediction of Karl Rahner has become increasingly relevant:
The devout Christian of the future will either be a “mystic”—someone who has “experienced something”—or will cease to be anything at all.
That is to say, where culture once carried and bolstered faith, experience must now step in and take its place. Otherwise, the metaphysical claims of faith risk becoming increasingly “positivistic,” implausible assertions aggressively posed to the world with a “like it or lump it” demand. As William James observed in his essay “The Will to Believe,” the mind needs to warm toward beliefs, sensing in claims some vitality and life. Lacking a cultural consensus to warm Christian doctrines, our “experiencing something” must provide the needed heat, warming positivistic propositions into plausibility.
This, then, is the Schleiermacherian criticism of Barthianism. When human experience is marginalized or ignored, Scripture and Tradition become positivistic. Evangelism becomes “like it or lump it.” Christianity speaks to the world in an alien, chilly, and inhuman voice.














