Forget the mistakes of the past and press on to the greater achievements of the future. Give everyone a smile. Spend so much time improving yourself that you have no time left to criticize others. Be too big for worry and too noble for anger.
Believe in yourself! Have faith in your abilities. Without a humble but reasonable confidence in your own powers you cannot be successful or happy. But with self-confidence you can succeed. A sense of inferiority and inadequacy interferes with the attainment of your hopes, but self-confidence leads to self-realization and successful achievement.