Here are two words, the microcosm and the macrocosm, the internal and the external. We get truths from both of these by means of experience; there is internal experience and external experience. The truths gathered from internal experience are psychology, metaphysics and religion; from external experience the physical sciences. Now a perfect truth should be in harmony with experience in both these worlds. The microcosm must bear testimony to the macrocosm, and the macrocosm to the microcosm; physical truth must have its counterpart in the internal world, and the internal world must have its verification in the outside. Yet as a rule we find that many of these truths are constantly conflicting. At one period of the world’s history the “internals” became supreme, and they began to fight the “externals;” at the present time the “externals,” the physicists, have become supreme, and they have put down many claims of the psychologists and metaphysicians. So far as my little knowledge goes, I find that the really essential parts of psychology are in perfect accordance with the essential parts of modern physical knowledge. It is not given to every individual to be great in every respect; it is not given to the same race, or nation, to be equally strong in the research of all the fields of knowledge. The modern European nations are very strong in their researches into external physical knowledge, but the ancient Europeans were weak in their researches into the internal part of man. On the other hand, the Orientals have not been very strong in their researches in the external physical world, but have excelled in their researches into the internal, and therefore we find that some of the Oriental theories are not in accordance with Occidental physics, neither is Occidental psychology in harmony with Oriental teachings on this subject. The Oriental physicists have been criticised by Occidental scientists. At the same time each rests on truth, and, as we stated before, real truth in any field of knowledge will not contradict itself, the truths internal are in harmony with the truths external.