Sam Parker and Mac Anderson expanded on this simple metaphor in their short book, 212°: the Extra Degree. They wrote,
Raising the temperature of water by one extra degree means the difference between something that is simply very hot and something that generates enough force to power a machine—a beautiful, uncomplicated metaphor that ideally should feed every endeavor—consistently pushing us to make the extra effort in every task we undertake…. It reminds us that seemingly small things can make tremendous differences.
