Tenacity comes from the right thinking. What a great statement! One thing that hit me about this, and other affirmation statements is they never say left thinking! When things are correct they are defined as right. Anyway, the greatest gap between those who achieve success and those who lack it, is the thinking gap. The successful have a different mind set, especially when it comes to their unsuccessful attempts.
The physician/research scientist, Jonas Salk, who developed the polio vaccine framed it like this...
" Not infrequently, I go to the laboratory, and people would say something didn't work. And I would say, Great we've made a discovery!"
It's the art of failing forward. Once you eliminate what doesn't work, you find yourself that much closer to what will work!
"Begin no day where we have ended another day; and no sunrise will find us where sunset left us."-Kahill Gibran