Happiness

People always talk about happiness, sadness, disappointment
and on and on. What about the concept that we all are responsible
for our own happiness. "People are about as happy as they make up
their minds to be" anon (because I can't remember who said it).....
I have always had this concept of being responsible for our own happiness
and yet that does not preclude those illusive "unhappy moments" that can
creep in from time to time.