It gives ME goosebumps because I know how completely random that moment was. I bet you have had a huge effect somewhere that you don't even know about -- just as I had no idea until I ran into that man again (whose name I have long forgotten, but I remember his face.)

As to your Godmother, she sounds like my maternal grandmother, but a bit nicer. You can't change their minds, but you can keep believing and behaving as you do, and thus provide an example of a good life that gives weight to your words. In other words, just stay as lovely and kind as you are.