in a darkened chamber, where there is no light to see his environment, who knocks himself up against one thing or another and bruises himself in the knocking. By the bruising, he finds out the obstacles; by the pain that he suffers, he finds that he can only move without pain in a certain direction. That is the scientific way. Every law of nature that has been so far discovered by Science has been discovered by experience which has turned ignorance into knowledge. Take Roger Bacon, one of the early chemists in the days when to investigate was heresy, in the days when to understand was crime. He was a monk, but a monk with the soul of a scientist in him. He experimented with chemical substances. He knew nothing about them. He did not know that putting these two together made a new and useful substance; that putting another two together made an explosive substance, that scattered everything around. He put together whatever he could find. What was the result? One time he was stretched senseless on the floor of his cell; another time a finger was blown off; another time an eye was blown out; onward and onward he went, with that dauntless courage, that interminable patience, which make the truly scientific man, who looks on knowledge as the supreme good. Struck senseless he came to again, and began again his work: missing a finger, he used the rest for new experimentation: when one eye had gone, the other remained with which he could still see. And, by such pain, by such loss, such infinity of dangers, Science slowly won its way to its knowledge of the laws around it. Inviolably, unchangeably, God manifests in Nature. The result of the long experimenting is that now, when the young man goes into the laboratory, textbooks are ready for him. A professor is there to warn him where the dangers of investigation lie. "Do not put," he will say to him, "nitrogen and chlorine together; if you put them together without certain precautions, you will find yourself in fragments and your laboratory will be destroyed." The boy in the laboratory now does not experience the dangers of earlier investigators. That, for him, is done. Men have come to show him the way, and the experience of the Past is the guide to the knowledge of the Present, and the warning to the dangers of the Future. So with Man. There were Professors, there were Teachers, round the infant races of our Globe. We call them Ṛṣhis; we call them Saints; we call them God-illuminated men; we call them Sages; Founders of Religions; and They said to infant humanity, as the Professor says to the boy in the laboratory: "Do that, don't do the other. Here lies safety; there lies danger. Take our experience as a guide, and you will realise the existence of the law; your happiness lies in your obedience, in your conformity with law." Hence, infant humanity started with the advantages of Sages to guide it who proclaimed the law.