Be so strong that nothing can ...

Be so strong that nothing can disturb your peace of mind. Talk health, happiness, and prosperity to every person you meet. Make all your friends feel there is something special in them. Look at the sunny side of everything. Think only the best, be as enthusiastic about the success of others as you are about your own. 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.
Be so strong that nothing can disturb your peace of mind. Talk health, happiness, and prosperity to every person you meet. Make all your friends feel there is something special in them. Look at the sunny side of everything. Think only the best, be as enthusiastic about the success of others as you are about your own. 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.

Quotes from the same author

Believe in yourself! Have faith in your abilities! Without a humble but reasonable confidence in your own powers you cannot be successful or happy.
If you want things to be different, perhaps the answer is to become different yourself.
Change your thoughts and you change your world.
You don't have to be tired and bored. Get interested in something. Get absolutely enthralled in something. Throw yourself into it with abandon.
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.