The Crucified Christ as the Measure of Theology.

“There is an inner criterion of all theology, and of every church which claims to be Christian, and this criterion goes far beyond all political, ideological and psychological criticism from the outside. It is the crucified Christ himself. When churches, theologians and forms of belief appeal to him – which they must, if they are to be Christian – then they are appealing to the one who judges them most severely and liberates them most radically from lies and vanity, from the struggle for power and from fear. …Whether or not Christianity, in an alienated, divided and oppressive society, itself becomes alienated, divided and an accomplace to oppression, is ultimately decided only by whether the crucified Christ is a stranger to it or the Lord who determines the form of its existence.” -Jurgen Moltmann, The Crucified God