Darkeyes had a good idea in expanding the Firefly theme song, but I feel it missed the mark in some regards. Here's the original theme song, for reference:

[Verse 1]

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.

[Verse 2]

Take me out to the black,

Tell them I ain't comin' back.

Burn the land and boil the sea,

You can't take the sky from me.

[Bridge]

[Refrain]

There's no place I can be

Since I've found serenity,

But you can't take the sky from me.

The meaning of the song is pretty clear. In verse 1, the singer (whom I call Mal for no good reason) says that he can survive without his "love" and his "land", even imprisonment, but his freedom is the open sky. He is renewed in the freedom that the air -- the black, space, etc. -- gives him. Verse 2 reinforces that: he can go "to the black" and never return to land for all he cares. Space can't be defiled, though the land can be burned and the seas polluted and boiled away. The refrain describes his ironic situation. Since he has found serenity (true peace, or if you want to be literal, the ship), he can never be at rest again: there is no planet he can call "home", he must always be moving, always experiencing the sky.

To that end, I have come up with my own extension of the song:

[Verse 1]

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.

[Verse 2]

Take me out to the black,

Tell them I ain't comin' back.

Burn the land and boil the sea,

You can't take the sky from me.

[Chorus]

There's no place I can live,

But you can't take what I can't give,

And you can't take the sky from me.

[Verse 3]

Take your war, leave me peace,

Go where I can find release.

Still you toil, still I'm free,

You can't take the sky from me.

[Chorus]

There's no place I call home

So I'll soar and ever roam,

Where you can't take the sky from me.

[Bridge]

[Verse 4]

Take my love, take my land,

Take me where I cannot stand.

Don't you see, the sky is free

So you can't take the sky from me.

[Chorus]

There's no place I can be

Since I've found serenity,

But you can't take the sky from me.