There's an importance of keeping an open mind. The brain is programmed to protect us, and that can mean imposing limits on what it thinks we can or should do. Constantly push at those limits, because the brain can be way too cautious.
Chrissie WellingtonThere is a special mystique about the marathon, for example, because of its length-but that's just the bit you do at the end of an Ironman
Chrissie Wellington