4. The Threshold In Nature and In Man

What we have shown with regard to the astronomical conception of the world could quite well be worked out for other spheres of knowledge. We should again and again find evidence of how the whole of mankind has in the course of evolution been pushed across what was for Olden times a Threshold on the path to higher knowledge. The apprehension that was felt in those times about the condition of soul evoked by such knowledge, has shown itself frequently in later centuries in the attitude of the churches, which preserve and tend to perpetuate the traditions of the past. Again and again the churches have rejected knowledge that has been attained in the progress of civilisation; and when, for example, the Roman Church refused to acknowledge the teaching of Copernicus (as it did until the year 1827), the reason was the same as [that which] in ancient times prevented the priests from giving out Mystery knowledge to the masses—namely, that the knowledge would bring man into uncertainty if he were not duly prepared beforehand.