This is in the recorded key of the song. It uses a shuffle rhythm with 
Some cool walk down?s between the verses.  
 
Capo 4 
 
         B                            E 
I keep a close watch on this heart of mine 
          B                      E 
I keep my eyes wide open all the time 
           A                          E 
I keep the ends out for the ties that bind 
               B               E       B    E 
Because you're mine I walk the Line 
 
I find it very very easy to be true                        
I find myself alone when the day is through 
Yes, I'll admit that I?m a fool for you 
Because you're mine I walk the Line 
Because you're mine I walk the Line 
 
As sure as night is dark and baby, day is light  
I keep you on my mind both day and night 
And happiness I?ve known proves that it?s all right 
Because you're mine, I walk the line 
 
You've got a way to keep me, baby, on your side 
You give me cause for the love that even I cant hide 
For you I know I'd even try to turn the tide 
Because you're mine, I walk the line 
Because you're mine I walk the Line