"Having an unusually large goal is an adrenaline infusion that provides the endurance to overcome the inevitable trials and tribulations that go along with any goal. Realistic goals, goals restricted to the average ambition level, are uninspiring and will only fuel you through the first or second problem, at which point you throw in the towel. If the potential payoff is mediocre or average, so is your effort. I'll run through walls to get a catamaran trip through the Greek islands, but I might not change my brand of cereal for a weekend trip through Columbus, Ohio. If I choose the latter because it is "realistic," I won't have the enthusiasm to jump even the smallest hurdle to accomplish it. With beautiful, crystal-clear Greek waters and delicious wine on the brain, I'm prepared to do battle for a dream that is worth dreaming. Even though their difficulty of achievement on a scale of 1-10 appears to be a 10 and a 2 respectively, Columbus is more likely to fall through."