A quote from Bruce Lipton that I think is related:

"Our positive and negative beliefs not only impact our health but also every aspect of our life. Henry Ford was right about the efficiency of assembly lines, and he was right about the power of the mind: “If you believe you can or if you believe you can't... you're right.” Think about the implications of the man who blithely drank the bacteria that medicine had decided caused cholera. Consider the people who walk across coals without getting burned. If they wobble in the steadfastness of their belief that they can do it, they wind up with burned feet. Your beliefs act like filters on a camera, changing how you see the world. And your biology adapts to those beliefs. When we truly recognize that our beliefs are that powerful, we hold the key to freedom. While we cannot readily change the codes of our genetic blueprints, we can change our minds and, in the process, switch the blueprints used to express our genetic potential. " - Bruce Lipton