Many people have a wrong idea of what constitutes true happiness. 
It is not attained through self-gratification, but through fidelity to a worthy purpose.
~Helen Keller
It is the paradox of life that the way to miss pleasure is to seek it first. The very first condition of lasting happiness is that a life should be full of purpose, aiming at something outside self.  ~Hugo Black 
If you want to be happy, set a goal that commands your thoughts, liberates your
energy, and inspires your hopes.  ~ Andrew Carnegie