Breaking Beliefs

For hundreds of years, the popular belief was that the human body could not run a mile in under 4-minutes. So no one did.⁣ ⁣ May 6, 1954: Roger Bannister completes a mile in 3:59.6 minutes.⁣ ⁣ After seeing that it was possible, two months later, John Landy races against Roger Bannister and they both come in under 4 minutes.⁣ ⁣ Since then, hundreds/thousands of people are beating that record everyday... because the belief that it 𝐜𝐚𝐧’𝐭 be done was broken.⁣ ⁣ What can we learn from this story?