Catholic Convert, Arlo Guthrie, On Light And Dark

"You can't have a light without a dark to stick it in." 

Arlo Guthrie

Wikipedia

http://en.wikipedia.org/wiki/Arlo_Guthrie

"If everyone lit just one little candle, what a bright world this would be!"

As a boy in the '50s this was a frequently televised jingle from The Christophers

http://www.christophers.org/page.aspx?pid=266

Here's the entire song which is not very faithful to the original jingle.

(I wish I could find an audio file of Perry Como's 1952 version.)

https://www.youtube.com/watch?v=Bf3uUrutwYE