The true meaning of your life doesn't lie in your experiences, but in your frequent positive interpretations of your past and present.
~ Hafiz
In order to live fully, you must understand that your experiences in life don't determine your constant feelings; your repeated interpretations of them always do.
The activation or survival of happiness in one's mind doesn't depend on external things. All that it needs are some consistent positive interpretations of your life and its experiences.
The repeated interpretations that you place on your experiences will never fail to determine your constant feelings towards them.