"If there are any who care to follow up the line of thought I have opened, who care for the questions that interest us of the East, I will talk as long as they care to listen, provided they will not ask for knowledge that will give them power over others, which cannot fail to be used for evil." This is but a glimpse of Hindu physics, yet it has helped us in the metaphysics. We now understand the chain of globes--in part. The earth is fourfold. As each atom of the earth is fourfold, so their aggregations give us prakritic earth, an etheric earth, a pranic earth, and a manasic earth--in coadunition and not like the skin of an onion. They are separate and distinct globes, each on its own plane. It is four down and three up for the Angel entering matter, whether from the outmost boundary of manasic matter, or the surface of the earth, or the cover of a baseball. The "chain of globes" in the Secret Doctrine represents the unity of the material universe. The three-fold nature of the astral model is revealed, and the unity of all prakritic things. But more than that, to many minds, will be the explanation it gives of why there are but four planes of vibration in matter; that the highest form of development in prakriti shows only four elements, prakriti or body, sensation or force, life, and mind, and that these last three, present in all things in esse, become present in posse when they work together harmonically. Chapter Six Our Place on Earth The next time our wise man from the east was asked to "say a few words and make his own topic," he spoke, perhaps, as follows: "How large do you think the earth is? You answer promptly, 7,912 miles in diameter. You are as far out of the way as you were in supposing that our sun could be a centre of gravity of a lot of planets revolving around it and around Alcyone without being a globe of ether. Now that it has been mentioned, you see very clearly for yourself that it must be a solar globe of ether. It follows from one of your physical axioms. When I tell you why the earth is and must be about fifty thousand miles in diameter, you will see that it must be so, and that you knew it all the time, but never stopped to formulate your knowledge. You have had the knowledge for three centuries without applying it.