Why you need to know the end of your story when you write the beginning – Edgar Allen Poe QUOTES FOR WRITERS (and people who like quotes)

Nothing is more clear than that every plot, worth the name, must be elaborated to its dénouement before any thing be attempted with the pen. It is only with the dénouement constantly in view that we can give a plot its indispensable air of consequence, or causation, by making the incidents, and especially the tone at all points, tend to the development of the intention.
Edgar Allen Poe