Persistence and resilience only come from having been given the chance to work through difficult problems.
Talent is cheaper than table salt. What separates the talented individual from the successful one is a lot of hard work.
Stubbornness does have its helpful features. You always know what you're going to be thinking tomorrow.
Stubbornness is a virtue if you are right, it's a fault if you're wrong, but you're wrong if you don't try.
Success is not final, failure is not fatal: It is the courage to continue that counts.