"The previous bowls have been poured out upon the earth, the sea, the rivers and fountains, the sun, the throne of the beast, and the great river Euphrates. This, the last and greatest, is poured into the air; and immediately there is heard a voice out of the temple in heaven, proclaiming, "It is done!" What, then, is symbolized by the plague poured into the air? Of what is the "air" the emblem? In the Revelation the whole of nature is used as a great complex parable or symbol. What does the atmosphere especially signify? And the answer is not difficult. If earth, sea, rivers, fountains, the sun, a throne, etc., denote manifest spiritual realities, the air obviously would symbolize an invisible spiritual realm. And here we are helped by sundry hints of scripture usage."
Much more in the text:
"Grasp it! A couple centuries ago we could not have understood as we do now how communication by sound and picture can be broadcast instantaneously THROUGH THE AIR. Wherever you are as you read these words, chances are there are myriad voices, pictures, and music IN THE AIR around you. A radio, television, or other electronic device tuned to the right wavelength would make them audible to you. You may not have realized it, but both spirit and soul in every man are a receiver and a transmitter. You may be tuned in on the wavelength of the Holy Spirit or you may tune in on the wavelength of the negative realm, the demonic, the spirit that now worketh in the children of disobedience. Prophets are uniquely sensitive to the spirit realm of God, whereas "psychics" are often sensitive to the soulical realm of man. You don't hear anything with your natural ears because spirit and soul do not broadcast in audible words or sounds. Spirit broadcasts in thoughts, attitudes, impulses, and emotions. The flesh broadcasts in thoughts, attitudes, impulses, and emotions of lust, perversion, greed, vanity, jealousy, anger, envy, deceit, fear, competition, strife, hatred, rebellion, violence, bitterness, debate, etc. Here is the real cause of all the world's evils! Why do movements like communism, New Age religion, the hippy movement, the rock culture, the drug culture, casual sex and sexual permissiveness, and a hundred more movements contributing to the deception of masses of people and the moral breakdown of society, suddenly rise up and sweep across the earth within a few short years like a plague, permeating everywhere, changing the attitudes, outlook, societal character, and moral fabric of everyone, including the people in the churches? What is this? It is the work of SPIRIT -- invisible, intangible energy -- power! Invisible, but very real. And very powerful! There is constantly in this world a transference of spiritual energy from the invisible world into the visible. Ah, it is the
power of the air, the powerful spirit organization in earth's atmosphere, the spirit that now worketh in the children of disobedience!"