I Walk The Line – Johnny Cash

As sure as night is dark and day is light
I keep you on my mind both day and night
And happiness I've known proves that it's right
Because you're mine, I walk the line

Dear Evans – February 10th 1978

I can’t stop thinking about you. Thoughts of you occupy my mind, day and night. The feeling I get with your hand in mine, or your lips on mine; it’s enough to sink the sun and raise the stars.

I’m so certain of how I feel for you, Lily. And with school ending in a few months, I hope your feelings are as certain as mine. I want those adult things with you, a family and a home. Saying these things doesn’t even scare me, not with you. I want to be with you, walking through life hand in hand.