A great quote I heard on this topic is Happiness = Reality - Expectations
With little or no expectations you become happy with the isness of life, and find joy in the way things are rather than how you might have hoped they would be.
The dangers with expectations is that it is limited to that which we know and removes the possibility of something much better and more wonderful than we could ever imagine. When we can release our expectations, we often end up with things beyond anythig we could have imagined. Thanks for your piece.