Eucken's discussion of faith and doubt is very illuminating. He protests against the conception of faith which concerns itself merely with the intellectual acceptance of this or that doctrine. This narrows and weakens its power, confining it to one department of life; whereas faith is concerned with the whole of life.
Faith is for Eucken "a conviction of an axiomatic character, which refuses to be analysed into reasons, and which, indeed, precedes all reasons ... the recognition of the inner presence of an infinite energy."
If faith concerns itself with, and proceeds from the whole of life, it will then take account of the work of thought, and will not set itself in opposition to reason. But it will lead where reason fails. It is not limited by intellectual limitations, though it does not underrate or neglect the achievements of the intellect. Faith enables life to "maintain itself against a hostile or indifferent world; ... it holds itself fast to invisible facts against the hard opposition of visible existence."
The vital importance of such faith to religion is clearly evident; and bound up with this is the significance of doubt. Doubt, too, becomes now, not an intellectual matter, but a matter for the whole of life. "If faith carries within itself so much movement and struggle, it is not surprising ... if faith and doubt set themselves against each other, and if the soul is set in a painful dilemma." Eucken considers it to be an inevitable, and indeed a necessary accompaniment of religious experience, and his own words on the point are forcible and clear. "Doubt ... does not appear as something monstrous and atrocious, though it would appear so if a perfect circle of ideas presented itself to man and demanded his assent as a bounden duty. For where it is necessary to lay hold on a new life, and to bring to consummation an inward transformation, then a personal experience and testing are needed. But no proof is definite which clings from the beginning to the final result, and places on one side all possibility of an antithesis. The opposite possibility must be thought out and lived through if the Yea is to possess full energy and genuineness. Thus doubt becomes a necessary, if also an uncomfortable, companion of religion; it is indispensable for the conservation of the full freshness and originality of religion—for the freeing of religion from conventional forms and phrases."
Eucken's views on immortality have already been dealt with. He does not accept the Christian conception of it, for he seems to limit the possibility to those in whom spiritual personalities have been developed, and he evidently does not believe that the "natural individuality with all its egoism and limitations" is going to persist.
In discussing the question of miracle, Eucken weighs the fact that a conviction of the possibility of miracle has been held by millions in various religions, and particularly in Christianity. He considers that the question of miracle is of more importance in the Christian religion than in any other, one miracle—the Resurrection—having been taken right into the heart of Christian doctrine. He finds, however, that the miracle is entirely inconsistent with an exact scientific conception of nature, and means "an overthrow of the total order of nature as this has been set forth through the fundamental work of modern investigation." He does not consider such a position can be held without overwhelming evidence, and does not feel the traditional fact to have this degree of certainty, or to be inexplicable in another way. He considers that the explanation of the miracle probably lies in the psychic state of the witnesses.
Eucken shows in general extreme reluctance to make a historical event a foundation of belief, and this no doubt accounts to some extent for his attitude with regard to miracles. He points out that "the founders of religion have themselves protested against a craving after sensuous signs," and that this protest "is no other than the sign of spiritual power and of a Divine message and greatness." He considers that the belief in, and craving for, sensuous miracle is an outcome of a "mid-level of religion," where belief is waning and spirituality declining. While, thus, he does not believe in sensuous miracle, he acknowledges and lays the greatest stress on one miracle—the presence of the Spiritual Life in man. It is, indeed, this miracle that renders others unnecessary.
In discussing the doctrine of the Incarnation, Eucken attempts to get at the inner meaning—the truth which the doctrine endeavours to express, and he finds this to consist in the fact of the ultimate union of the human and Divine, and this truth is one that we dare not renounce. He criticises the attempt that is made in Christianity to show that such union only obtained once in the course of history. Incarnation is not one historical event, but a spiritual process; not an article of belief, but a living experience of each spiritual personality.
He considers as injurious to religion in general the Christian conception of the Atonement. He believes that the idea that is to be expressed is that of the nearness of God to man in guilt and in suffering. In endeavouring to express this close intimacy the idea of suffering was transferred to God himself. The anthropomorphic idea of reconciliation and substitution thus arose, and this Eucken considers to have done harm. "The notion that God does not help us through His own will and power, but requires first of all His own feeling of pity to be roused, is an outrage on God and a darkening of the foundation of religion." So Eucken objects to the attempt to formulate the mystery into dogma. "All dogmatic formulation of such fundamental truths of religion becomes inevitably a rationalism and a treatment of the problem by means of human relationships, and according to human standards." "It is sufficient for the religious conviction to experience the nearness of God in human suffering, and His help in the raising of life out of suffering into a new life beyond all the insufficiency of reason. Indeed, the more intuitively this necessary truth is grasped, the less does it combine into a dogmatic speculation and the purer and more energetically is it able to work."
The conception of the Trinity is again an attempt to express the union of Divine and human, "the inauguration of the Divine Nature within human life." The dogma, however, involves ideas of a particular generation, and so threatens to become, and has indeed become, burdensome to a later age which no longer holds these ideas. Further, the doctrine of the Trinity has mixed up a fundamental truth of religion with abstruse philosophical speculations, and this has provided a stumbling-block rather than a help.