Haha surely I don't think I know what the word Happiness means anymore but thanks to your write up, I know a lot about happiness.
Indeed, happiness make one want to learn a lot of things which he wouldn't when he is angry. I think I can relate with that as I've experienced both angry and happy mood.
Happiness is free but it comes from our mindset about things especially when things are going bad. There is always something or someone who would make us happy, we just have to meet them when we are not to so happy.
Nice post, I love it.