I guess I never really thought of it in Geoff's terms, "all that I
think, and all that I say, comes from the heart", but I like that. I always regarded it as a thoughtful, sincere gesture anyway.
Now you've given me words to put to it. Thanks, from the bottom of my heart.

It warms the cockles of my heart to know I've enlightened you, FB! The meaning of the gesture was told to me by an Egyptian friend about thirty-five years ago, when we weren't supposed to have Egyptian friends.