Get this through your head — you are not responsible for other people's happiness.
Simple Reminders: Inspiration for Living Your Best LifeThe causes for happiness are within me, as are the answers to all life's important questions.
A Spacious Life: Memoir of a MeditatorHappiness is simply a habit of looking on the brighter side of everything.
Smile Anyway: Quotes, Verse, & Grumblings for Every Day of the YearI had walked into that reading-room a happy, healthy man. I crawled out a decrepit wreck.
Three Men in a BoatYou think that would have changed things? The answer is of course, and for a while, and never.
Too Much HappinessWhat I truly believe, I will achieve.
Positive Attraction: Seven Simple Steps for More Love, Money, and Happiness