This is the latest acquisition of the human spirit, and in most people who have not yet accustomed themselves to orderly, consecutive thought, it is a mere inchoate cloud disposed particularly in the region of the head. When looking at a person clairvoyantly there appears to be an empty space in the center of the forehead just above and between the eyebrows. It looks like the blue part of a gas flame. That is mind stuff which veils the human spirit, or Ego, and the writer has been told that not even the most gifted seer can penetrate that veil which is said to have been spoken of in ancient Egypt as “_the veil of Isis_” which none may lift and live, for behind that veil is the Holy of Holies, the temple of our body, where the spirit is to be left secure from all intrusion. To those who have not previously studied the deeper philosophies the question may occur: But why all these divisions; even the Bible speaks only of soul and body, for most people believe soul and spirit to be synonymous terms. We can only answer that this division is not arbitrary but necessary, and founded upon facts in nature. Neither is it correct to regard the soul and the spirit as synonymous. Paul himself speaks of _the natural body_ which is composed of physical substances: solids, liquids, gases and ethers; he mentions _a spiritual body_, which is the vehicle of the spirit composed of the mind and desire body, and _the spirit itself_, which is called Ego in Latin or “I” in English. That term “I” is an appelation which can only be made by the human spirit of itself. We may all call a dog, dog; or we may call a table, table, and any one else may apply the same name to the dog and to the table, but only a human being can be called “I” and only he himself can apply that most exclusive of all words, I, for this is the badge of self-consciousness, the recognition by the human spirit of _itself_ as an entity, separate and apart from all others. Thus we see that the constitution of man is more complex than appears upon the surface, and we will now proceed to note the effect upon this multiplex being of various conditions of life. CHAPTER V. LIFE AND DEATH _Invisible Helpers and Mediums._ There are two classes of people in the world. In one class the vital and dense bodies are so firmly cemented that the ethers cannot be extracted under any circumstances but remain with the dense body at all times and under all conditions from birth to death. Those people are insensible to any supersensuous sights or sounds. They are therefore usually exceedingly sceptic, and believe nothing exists but what _they_ can see. There is another class of people in whom the connection between the dense and the vital bodies is more or less loose, so that the ether of their vital bodies vibrates at a higher rate than in the first class mentioned. These people are therefore more or less sensitive to the spiritual world.