A Smile

Pinchando en el título se podrá oir un pequeño poema de Robert Burns que me resulta muy inspirador.
Este es el texto en inglés:
A smile is quite a funny thing
It wrinkles up your face
and when it's gone
you never find its secret hiding place...But far more wonderful it is to see what smiles can do
You smile at one, they smile at you
and so... one smile makes two.