If Jesus had formulated the scientific principles which pertain to his doctrines and his works, and had taught them to his disciples, there would have been no internal evidence whatever of the truth of his history, or that he ever existed. The reason is obvious. If his biographers had been in possession of that knowledge, no matter from what source they obtained it, it would have been possible for them to create a fictitious character possessing all the powers and attributes of Christ. A few years ago it would have been impossible for the most lively imagination to picture two men, standing a thousand miles apart, transmitting oral messages to each other over a wire stretched between them. If, however, a statement had been made by any one that he had seen the feat performed, the existence of the telephone to-day would be demonstrative evidence of the truth of his statement, however sceptical his own generation might have been. In other words, the discoveries of modern science would have developed the fact that he spoke the truth. If it were known that the man who made the statement knew absolutely nothing of the science of electricity, the internal evidence of its truth would be all the stronger; for a man well versed in the science of electricity might be supposed to be capable of imagining the possibility of such an invention, and stating its existence as a fact. But a man ignorant of electrical laws could by no possibility conceive the idea of the telephone; he must be presented with the concrete fact in order to be able to state it intelligently. It was so with the biographers of Jesus. They knew nothing of the scientific principles involved in the performance of his wonderful works. They knew only the facts, and they recorded them. He gave to his apostles just enough information to enable them to continue his work. He stated the conditions of success, and promised the world that whosoever complied with those conditions should be able to do even greater works than he had done. He formulated the doctrine of immortality, and stated the conditions of its attainment. His biographers have recorded his words, but not his reasons, for he gave none. If, therefore, science demonstrates that the powers that he possessed are possible, that the conditions of their exercise are precisely what he declared them to be, and that they cannot be exercised without a strict compliance with those conditions, the internal evidence for the truth of his history is overwhelming. Modified by the nature of the subject, and of the proofs required, the same may be said of his spiritual doctrines.