In the hands of an experienced engineer the dynamite bomb may be used to open a highway of commerce, and an intelligent farmer may use gunpowder to good account in clearing his field of tree-stumps, but in the hands of an ill-intentioned criminal or ignorant child an explosive may wreck much property and end many lives. The force is the same, but used differently, according to the ability or intention of the user, it may produce results of a diametrically opposite nature. So it is also with spiritual powers, there is a time-lock upon them, as upon a bank safe, which keeps out all until they have earned the privilege and the time is ripe for its exercise. As already said, the ether is physical matter and responsive to the same laws which govern other physical substances upon this plane of existence. Therefore it requires but a slight extension of _physical_ sight to see ether, (which is disposed in four grades of density), the blue haze seen in mountain canyons is in fact ether of the kind known to occult investigators as “_chemical ether_.” Many people who see this ether, are unaware that they are possessed of a faculty not enjoyed by all. Others, who have developed spiritual sight are not endowed with etheric vision, a fact which seems an anomaly until the subject of clairvoyance is thoroughly understood. The reason is, that as ether is physical matter, etheric sight depends upon the sensitiveness of the optic nerve while spiritual sight is acquired by developing latent vibratory powers in two little organs situated in the brain: the Pituitary body and the Pineal gland. Nearsighted people even, may have etheric vision. Though unable to read the print in a book, they may be able to “see through a wall,” owing to the fact that their optic nerve responds more rapidly to fine than to coarse vibrations. When anyone views an object with etheric sight he sees _through_ that object in a manner similar to the way an x-ray penetrates opaque substances. If he looks at a sewing machine, he will perceive, first an outer casing; then, the works within, and behind both, the casing furthest away from him. If he has developed the grade of spiritual vision which opens the Desire World to him and he looks at the same object, he will see it both inside and out. If he looks closely, he will perceive every little atom spinning upon its axis and no part or particle will be excluded from his perception. But if his spiritual sight has been developed in such a measure that he is capable of viewing the sewing machine with the vision peculiar to the World of Thought, he will behold a cavity where he had previously seen the form.