Organized religion, he saw, back in the day, had been purely a signal-to-noise proposition, at once the medium and the message, a one-channel universe. For Europe, that channel was Christian, and broadcasting from Rome, but nothing could be broadcast faster than a man could travel on horseback. There was a hierarchy in place, and a highly organized methodology of top-down signal dissemination, but the time lag enforced by tech-lack imposed a near-disastrous ratio, the noise of heresy constantly threatening to overwhelm the signal.

Ch. 23, Two Moors, p. 117 - Spook Country (2007)