"Christian eschatology in the language of promise will then be an essential key to the unlocking of Christian truth. For the loss of eschatology - not merely as an appendix to dogmatics, but as the medium of theological thinking as such - has always been the condition that makes possible the adaptation of Christianity to its environment and, as a result of this, the self-surrender of faith." -Jurgen Moltmann, Theology of Hope, p. 41