“The process of formalizing all knowledge to the exclusion of any tacit knowing is self-defeating.”— Michael Polanyi
“On a given day, a given circumstance, you think you have a limit. And you then go for this limit and you touch this limit, and you think, 'Okay, this is the limit.'”— Ayrton Senna
“The real purpose of running isn't to win a race, it's to test the limits of the human heart.”— George A. Sheehan
“I had ambition not only to go farther than any man had been before, but as far as it was possible for a man to go.”— James Cook