Frank Herbert on Prophecy

“Prophecy and prescience — How can they be put to the test in the face of the unanswered questions? Consider: How much is actual prediction of the "wave form" (as Muad'Dib referred to his vision-image) and how much is the prophet shaping the future to fit the prophecy? What of the harmonics inherent in the act of prophecy? Does the prophet see the future or does he see a line of weakness, a fault or cleavage that he may shatter with words or decisions as a diamond-cutter shatters his gem with a blow of a knife?”

“Muad'Dib could indeed see the Future, but you must understand the limits of this power. Think of sight. You have eyes, yet cannot see without light. If you are on the floor of a valley, you cannot see beyond your valley. Just so, Muad'Dib could not always choose to look across the mysterious terrain. He tells us that a single obscure decision of prophecy, perhaps the choice of one word over another, could change the entire aspect of the future. He tells us "The vision of time is broad, but when you pass through it, time becomes a narrow door." And always, he fought the temptation to choose a clear, safe course, warning "That path leads ever down into stagnation."”

“The trance-state of prophecy is like no other visionary experience. It is not a retreat from the raw exposure of the senses (as many trance states) but an immersion in a multitude of new movements. Things move. It is an ultimate pragmatism in the midst of Infinity, a demanding consciousness where you come at last into the unbroken awareness that the universe moves of itself, that it changes, that its rules change, that nothing remains permanent or absolute throughout all such movement, that mechanical explanations for anything can work only within precise confinements and, once the walls are broken down, the old explanations shatter and dissolve, blown away by new movements. The things you see in this trance are sobering, often shattering. They demand your utmost effort to remain whole, and even so, you emerge from that state profoundly changed.”

“The prophet is not diverted by illusions of past, present and future. The fixity of language determines such linear distinctions. Prophets hold a key to the lock in a language. The mechanical image remains only an image to them. This is not a mechanical universe. The linear progression of events is imposed by the observer. Cause and effect? That's not it at all. The prophet utters fateful words. You glimpse a thing "destined to occur." But the prophetic instant releases something of infinite portent and power. The universe undergoes a ghostly shift. Thus, the wise prophet conceals actuality behind shimmering labels. The uninitiated then believe the prophetic language is ambiguous. The listener distrusts the prophetic messenger. Instinct tells you how the utterance blunts the power of such words. The best prophets lead you up to the curtain and let you peer through for yourself.”