This article in the Boston Globe today suggests that even your closest friends are in some fundamental ways strangers to you — and that this is not necessarily a bad thing. While not 100% on board with the methodology of the survey on which the researchers base their conclusions, I find the general proposition largely non-objectionable, since I find that I’m often surprised about the things I learn about close friends, even the ones I’ve known for decades.
I’m not saying that it’s one huge revelation after another, followed by heartfelt reassessment of the friendship, or anything like that. I just mean that every now and again you get one of those “Huh. I didn’t know that” moments, and then you pretty much go on as before. I’m sure I’ve sprung a few of them on friends as well. Keeps things interesting, it does.