What of those, we may ask, who in religious experience find themselves "rooted and grounded" in Christ? Eucken's readers cannot expect relief from this quarter, for religious experience, he holds, is too subjective and human to ground an inference to the nature of Spiritual Life.[177] It is evident that Eucken has cut deep into Christianity alike on its historical, its doctrinal and its experiential sides. He distinguishes between form and substance, but acknowledges that "religion has lost unspeakably much through the upheaval of the old form";[178] and that this must somehow be made good. We might, without violence in the comparison, imagine the case of a Mohammedan who, trained in modern modes of thought but clinging to old associations, asked himself the question, Can we still be Mohammedans? "Yes," he might reply, "but we must retain only the essence or soul of Mohammedanism--its monotheism. The historical body or existential form of Mohammedanism, namely, that Mohammed was the prophet of God and that the Koran is a revelation from heaven, must be given up. And even when we speak of the unity and personality of God, we must remember that we are employing symbol and metaphor." 177: Eucken's neglect of the experiential standpoint is a common complaint among his critics. See M. Booth: "R. Eucken: His Philosophy and Influence," p. 199. 178: "The Truth of Religion," p. 577. The German, p. 404, is less emphatic. Eucken presents the remarkable phenomenon of a man whose thought is saturated with Christian influence, who appreciates the moral power and splendour of Christianity and its regenerative effects in history, and yet is unable to reconcile its distinctive features with the fundamental concepts of his philosophy. He shows the close connection of the questions, What think ye of Christ? and, What think ye of God? and that assured belief in the personality of God and in His incarnation in a Person belong together. "No one cometh to the Father but by me." That a Christianity such as Eucken preaches, removed from supports in history, in authoritative doctrine, in religious experience, perhaps even in a rational theism, can retain its moral power and act as a spiritual lever for the elevation either of the masses or the classes, remains to be proved.