Andrew Huberman· PhD
It has to happen a lot of times. How many? Hundreds of times per day for many, many days. That's what happened to me when I was squashing those flies. Every day I'd go in and look at the same pattern, and I'd close my eyes, and I'd see it. It didn't happen once. It required that spaced repetition we know from psychology and neuroscience is required to change the brain.