I have noticed this so many times during my life. Occasional events, acquisitions, occurrences, praises, acknowledgements, celebrations seem to make us happy. Actually, the joy which we were each meant to experience in our lives has been lost and replaced by these fleeting pleasures, which seemingly alternate with equal amounts of gloom, as though we spend our lives on a slow teeter-totter, up and down, ad infinitum.
My reading this summer has brought me to the understanding that joy, or the happiness referred to above by Deepak Chopra, is a state of being. And as Deepak says, it requires no reason. That's good news.
Now, if I can just figure out how to access that state after decades of the habitual pain vs. pleasure flip flop.