The evolution of Knowledge. Does not affect the truth of Science. Nor of Religion. Special characteristic of evolution of Religious Knowledge, that it is due to Revelation. All higher Religions have claimed to be Revelations. The evolution of Religious Knowledge in the Old Testament; yet the Old Testament a Revelation. Still more the New Testament. The miraculous element in Revelation. Its place and need. Harmony of this mode of evolution with the teaching of the Spiritual Faculty. LECTURE V. REVELATION THE MEANS OF DEVELOPING AND COMPLETING SPIRITUAL KNOWLEDGE. 'God, who at sundry times and in divers manners spake in time past to the Fathers by the Prophets, hath in these last days spoken to us by His Son.' _Hebrews_ i. 1. The doctrine of Evolution has been applied not only to the formation of all created things, but to the development of human knowledge; and this with perfect justice, though with some risk of misunderstanding. It is certain, and, indeed, it is obvious, that knowledge grows. The ordinary experience of mankind becomes larger and clearer in the course of time, and the systematised experience which we call Science makes the same progress in still greater measure and with more assurance. Our Science has been built on the labours of scientific men in past ages. New generalisations imagined by one thinker, new crucial experiments devised by another, new instruments of observation invented by another,--these have been the steps by which Science has grown and established its authority and enlarged its dominion. When or by whom the first steps were made we have no record. No mathematician that ever lived showed greater natural power of intellect than he, whoever he was, who first saw that the singular contained the universal; but we know neither his name nor his age, nor his birthplace nor his race. But after those first steps had been taken, we know who have been the leaders in scientific advance. And we know what they have done, and what they are doing; and we can conjecture the direction in which further advances will be made. And so we can trace the development of this kind of knowledge, and in a certain and very real sense this development may be called an evolution. But there is this difference between the evolution of nature and the evolution of the science of nature. The evolution of nature results in the existence of forms which did not exist before; the evolution of knowledge results in the perception of laws which were already in existence. The knowledge grows, but the things known remain. The knowledge is not treated as if independent of the things known or believed to be known, as a phenomenon belonging merely to the human mind, with beginnings and laws and consequences and history of its own. And, consequently, its having a regular growth is not used as an argument against its substantial truth.