Yet it has been keenly felt by those who attempt to defend this doctrine of the origin of the Spiritual Life, that they have nothing more to oppose to the rationalistic view than the _ipse dixit_ of Revelation. The argument from experience, in the nature of the case, is seldom easy to apply, and Christianity has always found at this point a genuine difficulty in meeting the challenge of Natural Religions. The direct authority of Nature, using Nature in its limited sense, was not here to be sought for. On such a question its voice was necessarily silent; and all that the apologist could look for lower down was a distant echo or analogy. All that is really possible, indeed, is such an analogy; and if that can now be found in Biogenesis, Christianity in its most central position secures at length a support and basis in the Laws of Nature. Up to the present time the analogy required has not been forthcoming. There was no known parallel in Nature for the spiritual phenomena in question. But now the case is altered. With the elevation of Biogenesis to the rank of a scientific fact, all problems concerning the Origin of Life are placed on a different footing. And it remains to be seen whether Religion cannot at once reaffirm and re-shape its argument in the light of this modern truth. If the doctrine of the Spontaneous Generation of Spiritual Life can be met on scientific grounds, it will mean the removal of the most serious enemy Christianity has to deal with, and especially within its own borders, at the present day. The religion of Jesus has probably always suffered more from those who have misunderstood than from those who have opposed it. Of the multitudes who confess Christianity at this hour how many have clear in their minds the cardinal distinction established by its Founder between "born of the flesh" and "born of the Spirit?" By how many teachers of Christianity even is not this fundamental postulate persistently ignored? A thousand modern pulpits every seventh day are preaching the doctrine of Spontaneous Generation. The finest and best of recent poetry is colored with this same error. Spontaneous Generation is the leading theology of the modern religious or irreligious novel; and much of the most serious and cultured writing of the day devotes itself to earnest preaching of this impossible gospel. The current conception of the Christian religion in short--the conception which is held not only popularly but by men of culture--is founded upon a view of its origin which, if it were true, would render the whole scheme abortive.