The Optimist Creed, by Christian D. Larson

Promise Yourself
To be so strong that nothing can disturb your peace of mind.
Promise Yourself
To talk health, happiness and prosperity to every person you meet.
Promise Yourself
To make all your friends feel that there is something in them.
Promise Yourself
To look at the sunny side of everything and make your optimism come true.
Promise Yourself
To think only of the best, to work only for the best, and to expect only the best.
Promise Yourself
To be just as enthusiastic about the success of others as you are about your own.
Promise Yourself
To forget the mistakes of the past and press on to the greater achievements of the future.
Promise Yourself
To wear a cheerful countenance at all times and give every living creature you meet a smile.
Promise Yourself
To give so much time to the improvement of yourself that you have no time to criticize others.
Promise Yourself
To be too large for worry, too noble for anger, too strong for fear, and too happy to permit the presence of trouble.