Recently, at the wedding of a good friend of mine, a group of us met a schoolteacher of ours. This schoolteacher taught us Chemistry in Form 5 and while she could not remember each and every one of us, she could remember our faces and some of our names.
The schoolteacher has now retired. The last time I saw her was probably some 10 years ago, perhaps even longer. Of course, a lot has changed since I was in Form 5, some 15 years ago. Yet looking at the group of us, the teacher said she was happy that we were still good friends.