It helps no one if you sacrifice your joy because others are suffering. We people who care must be attractive, must be filled with joy, so that others recognize that caring, that helping and being generous are not a burden, they are a joy. Give the world your love, your service, your healing, but you can also give it your joy. This, too, is a gift.
--from The Book of Joy: Lasting Happiness in a Changing World by Dalai Lama XIV and Desmond Tutu