Some films refuse you everything. They withhold explanation. They dwell on rain and rust and silent faces. They impose a length that feels, for the first twenty minutes, like an insult. And then they move into you and stay for the rest of your life. Meanwhile the film that gave you everything is forgotten by the time you reach the parking lot.

This book begins with that puzzle, and it does not stay with cinema for long.

Cinema is simply the cleanest laboratory we have ever built for a question that now governs almost every waking hour of modern life: what happens when someone else's structure takes command of your time. A film is the one art that takes your hours away from you. It decides how long each second lasts, and you cannot walk faster. Whatever attention really is, it shows itself there with a clarity it never has anywhere else.

And the laws found in that laboratory turn out not to be about movies at all.

That the escalation of spectacle is not a moral decline but a mathematical inevitability: any system holding a habituating audience at a constant level of excitement is forced to keep raising the dose, and past a certain threshold it buys arousal and nothing you will remember. That the flood of empty content is not laziness but an optimum, which is exactly why scolding its makers has never worked and never will. That the boredom you feel in the first half hour of something difficult is not a defect in you, or in it, but a necessary stretch of the only road that arrives anywhere. That what any institution is capable of producing is decided by what it charges for. And that technological progress, as we currently define it, is making spectacle cheaper and depth more expensive, so that the great artist of the coming decades will not be defeated by crude tools but by tools that are superb at something else.