What is happiness?

Few days ago, my colleague suddenly ask a question "What is happiness?" I do admit i didn't know how to explain about that! My first thought was different people have different definition of happiness! Maybe that it is. But one of my other colleague answer her this " When you didn't think of this question (what is happiness?), then you are really in happiness!" Well, i think and think. Ya, she is right! Is unpredictable she could answer that. A good answer which could really explain all. So what's your happiness is? (*_^)

(P/S: Hope everyone got happiness~~~)

Maye