Remember, happiness doesn't depend upon who you are or what you have; it depends solely upon what you think. So start each day by thinking of all the things you have to be thankful for. Your future will depend very largely on the thoughts you think today. So think thoughts of hope and confidence and love and success.
Dale CarnegieEnthusiasm is the dynamics of your personality. Without it, whatever abilities you may possess lie dormant; and it is safe to say that nearly every man has more latent power than he ever learns to use. You may have knowledge, sound judgment, good reasoning faculties; but no one-not even yourself-will know it until you discover how to put your heart into thought and action.
Dale CarnegieIt isn't what you have, or who you are, or where you are, or what you are doing that makes you happy or unhappy. It is what you think about.
Dale CarnegieRemember happiness doesn't depend upon who you are or what you have; it depends solely on what you think.
Dale Carnegie