The Gospel is the hermeneutical key to all of Scripture. Our knowledge of God should revolve and possess its basis upon the Gospel. T.F. Torrance says it this way:
This does not mean that all our knowledge of God can be reduced to Christology, but that, as there is only one Mediator between God and man, who is himself both God and Man, and only one revelation of God in which he himself is its actual content, all authentic knowledge of God is derived and understood in accordance with the incarnate reality of Godās self-revelation in Jesus Christ, and is formulated in doctrinal coherence with Christology. That is to say, doctrinal statements about God are possible and true only when Christologically groundedā (The Christian Doctrine of God, p. 17).