As I have told you before, the minds of the people from whom the Vedas came were intent upon following principles, discovering principles. They had no time to work upon details or to wait for them; they wanted to go deep into the heart of things. Something beyond was calling them, as it were, and they could not wait. Scattered through the Upanishads, we find that the details of subjects which we now call modern sciences are often very erroneous, but, at the same time, their principles are correct. For instance, the idea of ether, which is one of the latest theories of modern science, is to be found in our ancient literature in forms much more developed than is the modern scientific theory of ether today, but it was in principle. When they tried to demonstrate the workings of that principle, they made many mistakes. The theory of the all-pervading life principle, of which all life in this universe is but a differing manifestation, was understood in Vedic times; it is found in the Brâhmanas. There is a long hymn in the Samhitâs in praise of Prâna of which all life is but a manifestation. By the by, it may interest some of you to know that there are theories in the Vedic philosophy about the origin of life on this earth very similar to those which have been advanced by some modern European scientists. You, of course, all know that there is a theory that life came from other planets. It is a settled doctrine with some Vedic philosophers that life comes in this way from the moon.