I'm just an old chunk of coal
But I'm gonna be a diamond some day

I'm gonna grow and glow 'til I'm so blue, pure perfect
I'm gonna put a smile on everybody's face

But I'm gonna kneel and pray everyday
Lest I should become vain along the way

I'm just an old chunk of coal, now Lord
But I'm gonna be a diamond some day
[ Lyrics from: http://www.lyricsfreak.com/j/johnny+cash/old+chunk+of+coal_20810847.html ]
I'm gonna learn the right way to talk
I'm gonna search and find a better way to walk

I'm gonna spit and polish my old rough-edged self
Until I get rid of every single flaw

I'm gonna be the world's best friend
I'm gonna go around shakin' everybody's hand

I'm gonna be the cotton-pickin' rage of the age
Yes, I'm gonna be a diamond some day

I said, "I'm just an old chunk of coal, my Lord
But I'm gonna be a diamond some day"