divinity, may by it be brought into manifestation in the man of the present. That is why Yoga training was necessary for the ancient scientist; he must develop in himself the three aspects of God, if he were to understand them as manifested in the universe around him. Now, at our own stage of evolution, it is specially the life of Brahmâ--or the Brahmâ aspect of God--with which the human mind is coming into touch, because the mind in man is the reflection of the universal mind in Kosmos. That life is the life that is the force in the atom, that vivifies every atom, nay, that brings the atom into existence, as we shall see, and remains during the whole of the growth of the universe as the fundamental life that keeps those atoms as active particles building up innumerable forms. Only as the life of Brahmâ, the aspect of Brahmâ, is developed in the human Self will man be able to study the workings of that life in the atomic forms that are filled by it; and it is very significant that some of the greatest problems of modern science are now turning on the nature of the atom, and that scientists are asking, what is it? Is it matter or force? Is it a particle or a vortex? Never will that question be answered with certainty until man has developed in himself the power to respond to the life that thrills in the atom, until, developing intelligence within himself to the fullest point, he is able to answer by that intelligence to the vibrations of the atomic life outside him. We have defined consciousness as the power to answer to vibrations, and if man is to measure life, if he is to know the underlying causes of phenomena, he must develop in himself the power to respond to that life outside him; and in the perfection of human intelligence--the reflection of the Brahmâ aspect of God--lies the only possibility of solution for this much debated problem in science. I said it was significant, for this problem belongs to the Fifth race, and the Western world is at present peopled largely by the fifth sub-race of the great Fifth. Thus it takes to the very highest point the concrete mind of man, that marvellous activity of the intellect, that swift and yet patient study, bringing about the achievements that modern science is performing. All these are a testimony of the truth of the ancient teaching that sub-race after sub-race arises, each one with its own work to do, and we should look on the work of each sub-division of humanity as good in itself: each should not be regarded as an isolated and hostile expression, but as part of the Divine manifestation, expressing that portion which it is destined to express.