The freedom of God in which is grounded man’s becoming free to be faithful to God as God is faithful to him, the freedom in which the Christian life thus has its absolutely unique origin, is the freedom of which He, the God of Abraham, Isaac and Jacob, has made use in supreme majesty and condescension in the history of Jesus Christ. This history is the change, impossible with men but possible with God, and indeed possible only by God’s actual judgment, in which a man becomes God’s friend instead of his enemy, a man who lives for Him instead of being dead for Him. [...] The Christian is a man whose life Jesus Christ has entered as the subject of that history of His. He is a man whose acknowledged, recognised, and confessed Lord He has become. He is a man to whom Jesus Christ has given not just a potential but an actual share in that history of His. Thus Jesus Christ, His history, became and is the foundation of Christian existence; this and this alone. The Christian comes from Him, from His history, from knowledge of it; he also looks back thereto. This is the ground on which he stands and walks. This is the air which he breathes. This is the word which he has in his ears before, above, and after all other words. This is the light, the one light, the incomparably bright light, which illumines him (Church Dogmatics, IV.4, 11).