At the cross is the man who loves his enemies, the man whose righteousness is greater than that of the Pharisees, who being rich became poor, who gives his robe to those who took his cloak, who prays for those who despitefully use him. The cross is not a detour or a hurdle on the way to the kingdom, nor is it even the way to the kingdom: it is the kingdom come.
The key to the obedience of God’s people is not their effectiveness but their patience (Rev. 13:10). The triumph of the right is assured not by the might that comes to the aid of the right, which is of course the justification of the use of violence and other kinds of power in every human conflict; the triumph of the right, although it is assured, is sure because of the power of the resurrection and not because of any calculation of causes and effects, nor because of the inherently greater strength of the good guys. The relationship between the obedience of God’s people and the triumph of God’s cause is not a relationship of cause and effect but one of cross and resurrection.
John Howard Yoder, The Politics of Jesus