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

Arlo Guthrie

The Keeper of the Eddystone Light

Me father was the keeper of the Eddystone Light,
And he slept with a mermaid one fine night
Out of this union there came three,
A porpoise and a porgy, and the other was me!
Chorus:
With a yo-ho-ho, let the wind blow free,
It’s all for the life on the rolling sea!

http://home.comcast.net/~debee2/NNNS/Eddystone.html