To behold, use or perceive any extension of ourselves in technological form is necessary to embrace it. To listen to the radio or to read the printed page is to accept these extensions of ourselves into our personal system and to undergo the “closure” or displacement of perception that follows automatically. It is this continuous embrace of our own technology in daily use that puts us in the Narcissus role of subliminal awareness and numbness in relation to these images of ourselves. By continuously embracing technologies, we related ourselves to them as servomechanisms. That is why we must, to use them at all, serve these objects, these extensions of ourselves, as gods or minor religions. An Indian is the servomechanism of his canoe, as the cowboy of his horse or the executive of his clock. (p. 46)
Marshall McLuhan, Understanding Media (1964)