Art Thieme,
Thank you, I am really glad you mentioned that.
I'd read Sir Patrick a few times, but never knew what that line was about. Then, a few weeks ago, I was out in the early evening and saw a gibbous moon, quite dark. A couple of hours later, I saw a bright crescent moon, which was the OPPOSITE part, to what I'd seen earlier.
This puzzled me, as I've never noticed it before.
I mentioned it to a couple of people, who basically said I'd imagined it.
However, it seems very closely related to what you mention.
Eddie, (relieved that he wasn't hallucinating)