Sometimes when you smile, it's like a secret
And words could never tell it quite as sweet
It's not the world that fades away to silence
It's not a love song ringing in my ears
It's just a simple feeling that you give me
That keeps me warm as I walk through the night

Sometimes when you smile, it's contagious
And I can't help but join in with my own
It's like it's just for me, and just between us
It's not so very often that I see it

Sometimes when you smile, I think I love you
But I could never tell you that out loud.