[Zeke]

Actually, the lines occur in the other order. These are the full lyrics:

Take my love, take my land
Take me where I cannot stand

I don't care, I'm still free
You can't take the sky from me

Take me out to the black
Tell 'em I ain't comin' back

Burn the land and boil the sea
You can't take the sky from me

There's no place I can be
Since I found Serenity

But you can't take the sky from me...

The song is called "Ballad of Serenity," and for those who didn't know this, it's by Joss himself. (BVS fans know of Joss's fondness for musical composition -- he wrote all the songs in "Once More With Feeling" and co-wrote "Blue," the song played at the beginning and end of S7's "Conversations With Dead People.") It's an effective theme that fits the show's atmosphere perfectly. You can download it at FireflyWiki.

One more comment on the theme: the line about finding Serenity isn't just a pun. It makes more sense in light of this scene from the original pilot:

Simon: If [the Battle of Serenity] was so horrible, why'd he name the ship after it?
Zoe: Once you've been in Serenity, you never leave. You just learn to live there.