It's all in the mind
“Whether you think you can, or you think you can't – you're right,”
Henry Ford is responsible for pioneering many firsts at the dawn of the 20th Century. He conceptualized the mass production assembly line which allowed Ford to sell many more cars. Ford chose to provide his employees with a livable wage in 1914 (effectively doubling their salary) which forced his competitors to pay their employees more. Ford also offered profit sharing, helping improve employee morale and retention. Ford understood that by compensating his workers well, they could afford to buy one of those Model-T's rolling off the assembly line which they had just helped to build. Win-win.
Ford gained his fair share of critics, with some predicting Ford Motor Company would go out of business. We know how the story ends. Ford has been a household name for more than 100 years. It would never have happened had not Ford stuck to his convictions and what he thought was right for his business AND his employees. He was fully convinced in his mind that he was doing the right thing in his heart of hearts. Maybe it helps that he was a pacifist.
Ford did not allow the opinions of other people limit the potential of his company and his ideas, or the belief that they could come to fruition. He relied on faith and the courage of his convictions. It was made possible by him believing so. The same could be said for Elon Musk with Tesla and SpaceX.
We are only limited by our own thoughts and beliefs. When we realize this, the possibilities become more probable.