I was happy - once
You'd never believe it today
I got careless - once
All at once you got away [ Lyrics from: http://www.lyricsmode.com/lyrics/f/ferlin_husky/once.html ]
Life had beauty - once
It's not worth livin' today
I slipped out - once
All at once you slipped away
Oh great regret like the flavor of wine
Only grows deeper with the passing of time
Life had meaning - once
It's cold and so empty today
I was foolish - once
I let my "once" get away
