"We are visitors on this planet. We are here for ninety, one hundred years at the very most. During that period, we must try to do something's good, something useful with our lives. Try to be at peace with yourself, and help others share that peace. If you contribute to other people's happiness, you will find the goal, the true meaning of life."
- The Dalai Lama
If I might be so bold as to add:
"If you make it your life's work to help others contribute to other people's happiness, you will have both found and shined light on the goal for others to see, and strengthened the true meaning of life for all humanity."
- Paul Tannahill