"Some people want everything to be perfect before they're willing to commit themselves to anything. But commitment always precedes achievement. I am told that in the Kentucky Derby, the winning horse effectively runs out of oxygen after the first half mile, and he goes the rest of the way on heart. That's why all great athletes recognize it's importance. NBA legend Michael Jordan explains that 'heart is what separates the good from the great.' If you want to make a difference...look in your heart to see if you're really committed.
From "The 21 Indispensable Qualities of a Leader" by John Maxwell