The Wright brothers are credited with the first controlled, manned, powered flight on December 17th, 1903. Although they failed hundreds of times before they succeeded, they never gave up on their dream. Had they done so, invention of the modern aircraft would have been attributed to someone else.
This example illustrates the power that exists in the human mind. In the Wright brothers day, no one had ever seen an airplane fly. It would have been easy for them to conclude that their goal was unachievable. Today, we know it wasn’t. For the Wright brothers, believing was the first step.
Full article here: https://www.forbes.com/sites/theyec/2011/12/01/how-to-achieve-success-in-6-thoughts/#308178c1fa6d