The wrong kind of praise ...

The wrong kind of praise creates self-defeating behavior. The right kind motivates students to learn.
 Carol S. Dweck

Quotes from the same author

Becoming is better than being
 Carol S. Dweck
No matter what your current ability is, effort is what ignites that ability and turns it into accomplishment.
 Carol S. Dweck
Praising children’s intelligence harms their motivation and it harms their performance.
 Carol S. Dweck
I believe ability can get you to the top, says coach John Wooden, but it takes character to keep you there.… It’s so easy to … begin thinking you can just ‘turn it on’ automatically, without proper preparation. It takes real character to keep working as hard or even harder once you’re there. When you read about an athlete or team that wins over and over and over, remind yourself, ‘More than ability, they have character.'
 Carol S. Dweck
For twenty years, my research has shown that the view you adopt for yourself profoundly affects the way you lead your life. It can determine whether you become the person you want to be and whether you accomplish the things you value.
 Carol S. Dweck