Nineteen years ago, shortly after I hired Mark Hurst to join the team at my internet startup Yoyodyne, I turned to him and said, "I don't think the web makes sense." This was the most expensive mistake I ever made.
At the time, we were working with AOL, CompuServe and other online services. The web was in its infancy, and I notoriously said, "It's just like Prodigy, but slower and with no business model."
It took me eighteen months to change my mind. Actually, that's not true. It took me about five minutes to change my mind, after eighteen months of being wrong. I still remember how it felt to feel that flip switch in my head.
This is one of the assets of youth, and something that's worth seeking out and maintaining. That flip, the ability, when confronted with a world that doesn't match the world in your head, to say, "wait, maybe I was wrong." We're not good at that. Science brings us overwhelming data about the truth of washing hands before surgery, of the age and origin of species, about the efficacy of placebos, and the natural instinct is push those facts away, rather than find that moment where were can shift our thinking.
If you needed to, could you argue passionately for that thing you don't believe in today? Could you imagine walking over to the other side of the new argument, to once again hear that sound?
That's the essential skill of thriving in a world that's changing fast.