There is beauty in knowing that you control your own level of happiness.  The trouble is most people were never taught to manage their emotions.  Bad things happen as often as good things - what we choose to focus on matters.  Even "bad" things have something good within.  It's your job to learn how to "flip it!" when things don't go as planned and you start feeling discontent.  Even if you lose sight for a moment, recovery is possible - ALWAYS!