You Are Always Late

Light reaches your eye in an instant, but seeing takes time. The signal has to crawl back through the nerves and be assembled into a picture, and that assembly costs anywhere from a tenth to half a second. Which means everything you see has already happened. You are watching a recording, always a beat behind the world.

The brain hates this lag, and cheats brilliantly to hide it. It predicts. It works out where the moving ball, the passing car, your own hand will be by the time the image is ready, and quietly shows you that forecast instead of the stale truth. When you catch a ball, you reach not for where it was but for where your brain calculated it would arrive. You are not responding to the present. You are responding to a guess about it, served up so smoothly you have never once felt the seam.

You have spent your whole life half a second behind, watching a forecast, and calling it now.

And if "now" is a prediction your brain makes — how far can you trust the rest of it?