From Karl Barth’s Church Dogmatics v.4.3.2 – The Doctrine of Reconciliation

To sum up, we may say there is committed to it the gospel, I.e. The good, glad tidings of Jesus Christ, of the real act and true revelation of the goodness in which God has willed to make and has in fact made Himself the God of man and man His man.  This great Yes is its cause.  It has no other task besides this. (page 800)