Achievement of your happiness is the only moral purpose of your life, and that happiness, not pain or mindless self-indulgence, is the proof of your moral integrity, since it is the proof and the result of your loyalty to the achievement of your values.
"You are always a valuable, worthwhile human being, not because anybody says so, not because you''re successful, not because you make a lot of money, but because you decide to believe it and for no other reason."