A truth bomb from Henry Winkler
Tenacity + Courage + Honesty About Your Ability + Gratitude = Accomplishing What's On Your Mind
Oh man if I were the tattoo type and I was looking for a really long tattoo this would be a good candidate! I love how one good quote can fire me the hell up!
(You can listen to the entire Henry Winkler interview with James Altucher from which that quote is taken plus read a summary of the best points he makes here.)