The true God is the Father of the man John Evangelist could call Love Incarnate—and he is nothing but that Father. The true God is the Father of the man Dietrich Bonhoeffer could call The Man for Others—and he is nothing but that Father. The true God is the Father—and nothing but the Father—of the man who raised his friend from from the dead and saved a wedding from fiasco and drove well-meaning merchants from the Temple and begged forgiveness for his executioners and called down judgment on the religious and proclaimed the poor blessed and indeed etc. Would you know who the true God is? Read the Gospels—and that not as teaching about God or his will, but as the story of God, of the Son whose Father he is.
No other God has this Son. Nor would any other want him.
Robert W. Jenson
Source: Eclectic Orthodoxy