Just what is happiness and is it really external sources that can make you happy?

http://highway2zenith.com/what-is-happiness/
Just what is happiness and is it really external sources that can make you happy?
When something good happens in your life or to you, happiness ensues. But is it genuinely this external source that gives you happiness or is there something deeper inside which determines if you are happy or not?

Think of this, can THINGS tickle your brain to help stimulate pleasure? No, it's a direct result of your way of thinking about the THINGS that results in pleasure.

By simply changing the way you think you really can change your life. This is not some new age nonsense, this actually works and it's not difficult to reason why it works. Our minds are so engaged with material things that it's challenging for us to see the real world.