What is Happiness

Today morning. I open my email and found a very wise sentence   . After thinking few minutes.. I realised it is true... the meaning is very deep. I copy and paste these words to share with all of you.

  If there are things that are causing you to suffer, you have to know how to let go of them. Happiness can be attained by letting go, including letting go of your ideas about happiness. You imagine that certain conditions are necessary to your happiness, but deep looking will reveal to you that those notions are the very things standing the way of happiness and are making you suffer.
*** ThicH NhaT HanH ***