Thank you for researching this, Nowhere Man. As I mentioned in my earlier post, I've always thought of 4th Time Around as Bob Dylan's answer song to The Beatles' Norwegian Wood. And I agree with you regarding Dylan being an inspiration to John during this period of his songwriting career. Bob Dylan influenced many songwriters during the mid-60s.
You're welcome. About the song "4th Time Around", it seems that Bob is giving a direct message to John in the last lines: "I never asked for your crutch, now don't ask for mine."