Never Judge a Book by its Voice

How is it that when someone sings...beautifully and passionately...it has the ability to send shivers through you?

How can someone's singing voice...and we're not talking about their speaking voice at that...elicit such an emotional response from humans?

If we saw these two people in a crowd or passed them on the streets...or even actually engaged them in conversation...their hidden, mesmerizing powers would be completely lost on all of us.

But as soon as they open their mouths...and sing...we are enraptured.