Even man, the highest form of created beings, needs many things for his very life; first of all he needs air, and if he is deprived of it for a few minutes, he dies. He is also dependent on water, food, clothing, warmth, and many other things. On all sides he is surrounded by dangers and difficulties, against which his physical body alone cannot cope. If a man looks at the world around him, he will see how all created things are dependent and are captive to the laws of Nature. Man alone, by his spiritual power, has been able to free himself, to soar above the world of matter and to make it his servant.