God doesn't change…

We have sought repeatedly to explain that any model requiring us to split the Father from the Son violates the fundamental Trinitarian theology of God and must be renounced. Equally central is the assertion that God does not change; least of all does he change as a result of the self-giving of the Son. This is a central affirmation. The event of the cross is the enactment in history of an eternal decision within the being of God. God is not changed by the historical event but has always been going out from God’s self in sacrificial love.—Fleming Rutledge, The Crucifixion, 500 (emphasis original)