That's how you write novels actually. You suddenly hit upon something and you realize this is the path you were meant to take. You'd be a fool if you didn't follow it. Perhaps it's like solving a difficult question in pure mathematics. There must be a moment when the solution is so simple and evident that you wonder why you hadn't come upon it before. When you do come upon it, you know it in the deepest part of your being. It carries its own logic.
Don DeLilloTime seems to pass. The world happens, unrolling into moments, and you stop to glance at a spider pressed to its web. There is a quickness of light and a sense of things outlined precisely and streaks of running luster on the bay. You know more surely who you are on a strong bright day after a storm when the smallest falling leaf is stabbed with self-awareness. The wind makes a sound in the pines and the world comes into being, irreversibly, and the spider rides the wind-swayed web.
Don DeLillo