Neanderthal man listened to stories, if one may judge by the shape of his skull. The primitive audience was an audience of shock-heads, gaping around the camp-fire, fatigued with contending against the mammoth or wooly-rhinoceros, and only kept awake by suspense. What would happen next? The novelist droned on, and as soon as the audience guessed what happened next, they either fell asleep or killed him.
E. M. ForsterThis element of surprise or mystery — the detective element as it is sometimes rather emptily called — is of great importance in a plot. It occurs through a suspension of the time-sequence; a mystery is a pocket in time, and it occurs crudely, as in "Why did the queen die?" and more subtly in half-explained gestures and words, the true meaning of which only dawns pages ahead. Mystery is essential to a plot, and cannot be appreciated without intelligence.
E. M. Forster