happiness

"Most folks are about as happy as
they make up their minds to be."
- Abraham Lincoln

Happiness is a very fuzzy concept and can mean many things to many people.
Part of the challenge of the science of happiness is to identify all the different
uses of the word "happiness", or else to understand its various components.

happiness is usually associated with smiling, of which there are many variants:

             

the enigmatic                  the smile that makes      the giggle (always with          the carefree laugh    
smile                             you smile too                 a hand over the mouth!)

and of course someone always has   

I think that happiness is a fleeting moment and very hard to describe.

But you always remember such moments with great clarity.