This is from Ann Stevens, Thought for the Day.
We all know and remember a smiley person-someone whose heart seems to
radiate through their teeth. And when they do, notice how its almost
impossible not to smile back…unless you are feeling very, very grumpy! So,
if you don’t feel a smile coming on..why not do it anyway. Not only does it
transform your inner chemical production and create “happy hormones”, but when
people are at the other end of your smile, they smile back (well most do).
And if you really don’t feel like smiling genuinely at life, the universe and everybody-
fake it until you make it!