We can best appreciate the important part the Mystic Sense plays in science by a survey of the foundations of accepted scientific fact. The whole body of our knowledge concerning the material universe is constructed upon a few ultimates, chief among them being the ether and the atom. The physical senses, so busy in that workshop of science, the laboratory, cease to be important when we deal with these fundamentals. The discoverer of ether never perceived it by touch, taste, smell, sight or hearing. Newton postulated it because he said it was a necessity, exactly as we postulate the existence of God. How could there be attraction across the measureless spaces which separate worlds if there were not some intangible substance? The ether was therefore discovered to order by the Mystic Sense and accepted because it proved a good working hypothesis. We are solemnly told by physicists that it is an “elastic solid,” a “pervasive fluid,” a “tenuous substance.” And yet when we chase this elusive something into a corner we find it to be “that which undulates,” a form of motion—well, so is a field mouse! Again the atomic theory, first conceived by the Greeks, was restated by Dalton more than 2,000 years later, who brought it down “from the clouds to the laboratory and factory.” But neither Dalton nor anyone else ever touched an atom, saw an atom, heard an atom, smelt an atom, or tasted an atom, ultimate of matter that it is. The physicist claims, however, “that though he cannot handle or see them, the atoms and molecules are as real as the ice-crystals in the cirrhus clouds that he cannot reach—as real as the unseen members of a meteoric swarm whose death glow is lost in the sunshine, or which sweep past us unentangled in the night”—that the atoms are in fact “not merely helps to puzzled mathematicians, but physical realities.”[13] All this may be so. Nevertheless both the ether and the atom are so little material as to escape physical perception as completely as a ghost, and so nearly spiritual as to be perceived by the Mystic Sense with sufficient clearness to enable the scientist to use them as his fundamental hypothesis. If this reasoning be true, the ultimate of matter is spiritual and not material! As with the ether so with the atom, it was a scientific necessity. The Mystic Sense contributed it to the laboratory, where it has been contentedly accepted as the ultimate of matter, until the other day, when someone opened the window of the atom to discover that it was a huge universe, of which a β corpuscle or electron was the least particle, related to the atom as a mote dancing in the sunbeam is to the room where it is. No sense but the Mystic Sense has yet sensed the electron. Not only, then, has science accepted the findings of the Mystic Sense, but, having accepted them, it has in the main not had reason to distrust them and continues confidently to base its research upon the foundation thus laid.