Written not long after the beginning of World War II, Barth’s statement, ‘that every genuine proclamation of the Christian faith is a force disturbing to, even destructive of, the advance of religion’, has clout.

Natural Theology is on Barth’s radar. In part because of nominalism and how it was used to subsume Christians into National Socialism. Natural Theology was a slippery slope, that fed into the notion that the Führer knows best; that those in the Fatherland (State) who showed allegiance to anyone other than the Führer were traitors; or worse, heretics.

There could only be ‘Mien Kampf’, the Führer and his prophets. This is different to the sole claim and uniqueness of God,  ‘attested by God, in His revelation [Covenant and Jesus Christ] by prophets and apostles. This means that all so-called or would-be deities and divinities apart from Him lose their character as gods. The faith and worship offered to them cannot be taken seriously. They fade away as idols and nonentities. And so God’s freedom, majesty and sovereignty shine out in His uniqueness […] The decision is reached that this God who chooses us is God alone, and that all other so-called or would-be gods are not what they claim to be.’ (Barth, p.443)

Present in this section is a direct reference to Barth’s historical context. It might be pessimistic to suggest a connection between his time and our own, but I don’t consider it a stretch.

‘It was no mere fabrication when the Early Church was accused by the world around it of atheism, and it would have been wiser for its apologists not to have defended themselves so keenly against this charge.

There is a real basis for the feeling, current to this day, that every genuine proclamation of the Christian faith is a force disturbing to, even destructive of, the advance of religion, its life and richness and peace.

It is bound to be so.

Olympus and Valhalla decrease in population when the message of the God who is the one and only God is really known and believed. The figures of every religious culture are necessarily secularised and recede. They can keep themselves alive only as ideas, symbols and ghosts, and finally as comic figures. And in the end even in this form they sink into oblivion.

No sentence is more dangerous or revolutionary than that God is One and there is no other like Him.

All the permanencies of the world draw their life from ideologies and mythologies, from open or disguised religions, and to this extent from all possible forms of deity and divinity. It was on the truth of the sentence that God is One that the “Third Reich” of Adolf Hitler made shipwreck.

Let this sentence be uttered in such a way that it is heard and grasped, and at once 450 prophets of Ball are always in fear of their lives. There is no more room now for what the recent past called toleration. Beside God there are only His creatures or false gods, and beside faith in Him there are religions only as religions of superstition, error and finally irreligion.

If everything divine is not recognised, sought and honoured as the sole possession of the one God, He is robbed of His honour, and the worship apparently offered to Him is profaned.’

(Karl Barth, Church Dogmatics, II/I 1940 p.444)