what is the title

here are some lyrics...while sitting on a crowded southbound train it happened just the other day....

'Keep on "Keepin on by Len Chandler ??

On a crowded southbound train-It happened just the other day; I could have sworn that I was rolling back As the train beside me slowly pulled away. Well, my whole life long it seems I've been on that track, With everybody rolling on and me just slipping back; And they don't wave good-by and they don't look back; So I guess I've gotta keep on keepin on,

Thank you!!