I'll have One Cup of Happiness Please.

If happiness is dependant on external circumstances, then we are like a leaf at the mercy of the wind, going through the emotional roller coaster of life with no control, going up and down and up and down.

But if we learn to understand that happiness and suffering is a matter of our internal reaction to the circumstances of the external world, we then might begin to regain some equilibrium over ourselves.

In laymen terms. Happiness is not something you get when something good happens to you in the world, happiness is simply a state of mind. "Perspective"

The cup is not half empty, rather it is half full. You see?