There's a moment during a heavy barbell squat, about quarter-way into pressing the weight back up, when the expanse of your physical, emotional, cognitive, and moral terrains narrows to a pinprick through which you must answer a single question: Do you believe you can lift the weight up?

The believer ascends. The skeptics, doubters, and disbelievers: crushed.

Do you believe you can lift the weight?

Do you really?

The barbell is a perfect lie detector. It is 100% accurate.

So it goes with all the heaviest things.