Those who hope in Christ can no longer put up with reality as it is, but begin to suffer under it, to contradict it. Peace with God means conflict with the world, for the goad of the promised future stabs inexorably into the flash of every unfulfilled present.… That we do not reconcile ourselves, that there is no pleasant harmony between us and reality, is due to our unquenchable hope. This hope keeps man unreconciled, until the great day of the fulfillment of all the promises of God. It keeps him in statu viatoris, in that unresolved openness to world questions which has its origin in the promise of God in the resurrection of Christ and can therefore be resolved only when the same God fulfills his promise. This hope makes the Christian Church a constant disturbance in human society, seeking as the latter does to stabilize itself into a “continuing city.” It makes the Church the source of continual new impulses towards the realization of righteousness, freedom and humanity here in the light of the promised future that is to come.
— Jürgen Moltmann, Theology of Hope