With the ‘Word’, God created the universe from the formless dark. He tamed chaos through organization of matter into a blueprint of His ‘idea’. Once named, things can be identified as separate from us and accordingly, can be experienced.
Plato believed that timeless archetypal ‘ideas’ format our everyday experience of reality. This is good ‘air stuff’. Not surprisingly, air folks operate through ‘preconceived ideas’ of the ‘perfect’ world. It is in air houses (3rd, 7th, and the 11th), that you manifest your ideas even if you are often disappointed when they don’t accord with ‘reality’.
How might this work in practice?
In the 3rd house, you learn about the ‘word’. Planets here must inform your ‘idea’ (i.e. blueprint plan) of how the world turns. In the 7th house, you meet the ‘other’ and go crazy when he/she doesn’t comply with your plan. Planets here must polarize, contrast, and compare. Expect debate and disagreement as you discover the world doesn’t turn quite as you’d planned. In the 11th house, you bring your ideas to a wider audience. Through association, you give voice to your idea of how the world should turn.
Air house planets are often restless and unhappy. They regularly generate a good deal of sense ‘chatter’ rather like a group of kids on a school trip. However with focus, planets in the air houses can tap into the primal energy of the ‘first cause’ and personally experience the ‘will of God’. 
Magicians know that the pure ‘Will’ of every man is already in perfect harmony with the ‘divine will’ and in face they are one and the same. Will however is not the same as the Ego. Call it what you like – Tao, Platonic Ideals, Divine Will, or ‘just the way things are’ – you are part of a greater cosmic plan and you prosper when you act in harmony with that plan. You are a magician when you consciously work to effect change rather than reacting unconsciously to external events.
“Magick is the Science and Art of causing change to occur inconformity with Will” (Magick in Theory and Practice, Paris: Lecram press, 1929, Reprint, New York: Magickal Childe Publications, 1990.
It would seem that the air houses are where you can best practice Magick. It is here that you experience the feminine giving ‘manifest’ form to the ‘intention’ of the masculine. Within ‘her’ you keep from being lost in the fog as you take form, grow, and achieve fulfilment.
In the air houses you manifest the ‘Word” of God.
 Timothy Freke, The Illustrated Book of Sacred Scriptures, Quest Books, Illinois (1998), p. 22. Actually this concept is older than Plato. According to the Hermetica, the word is the primal vibration through which the universe manifests – it is ‘the idea of beautiful order’.
 The Cosmological Argument, also known as the First Cause Argument, is one of the most important arguments for the existence of God. This is not only because it is one of the most convincing, but also because it is the one most used. The idea that everything that happens must have a cause, and that the first cause of everything must have been God, is widespread.
 Lon Mil Duquette, The Magick of Thelema, Samuel Weiser, Inc. York Beach, ME (1993), p. 3.
 The Ego has a hero-like mantle that does violence against nature; killing and maiming are standard Ego/hero activities. Action is a modern Egocentric mantra – i.e. must ‘make it happen’. Contrast this with ‘Will’, which, as I understand it, is expressed in complete harmony with nature and with faith and trust in life. The story of the Velveteen Rabbit is a good example. Here a toy rabbit becomes a ‘real’ rabbit by states. First he learns about the power of ‘love’s as he becomes the treasured to of the Boy. Later, when as the result of an outbreak of scarlet fever he is to be destroyed, he sheds a ‘real tear’ as he remembers the magic of his special relationship with the Bly. At this point, a fairy turns him into a real rabbit because he has earned it. Conscious acceptance of the pain of living rather than knee-jerk struggle against it, allowed The Velveteen Rabbit to become truly alive.
- Review: Low Magick By Lon Milo DuQuette (runesoup.com)