Success is not the key to happiness. Happiness is the key to success. If you love what you are doing, you will be successful.
Sometimes your joy is the source of your smile, but sometimes your smile can be the source of your joy.
We can't control the world. We can only (barely) control our own reactions to it. Happiness is largely a choice, not a right or entitlement.
We are shaped by our thoughts; we become what we think. When the mind is pure, joy follows like a shadow that never leaves.
There are souls in this world which have the gift of finding joy everywhere and of leaving it behind them when they go.
Joy is what happens to us when we allow ourselves to recognize how good things really are.