作曲：Johnny Cash

I keep a close watch on this heart of mine

I keep my eyes wide open all the time

I keep the ends out for the ties that bind

Because you're mine I walk the line

I find it very very easy to be true

I find myself by myself when each day is through

I'll admit that I'm a fool for you

Because you're mine I walk the line

I'll admit that I'm a fool for you

Because you're mine let me I walk in the line

I keep a close watch on this heart of mine

I keep my eyes wide open all the time