Meeting people is like walking up to a new mirror
Despite what we may think about "knowing ourselves" and knowing who we are, we can only understand who we really are from the reflection of ourselves in other people's eyes. The only way that the Universe perceives us is through observation of others and in that way it's a bit of a Schroedinger's cat going on. The observed is influenced by the observers and it has no other state than the observed one. To put it differently, if there was nobody around us, would we really know who we are? So every new person we meet is like a new mirror that we face and it shows us an image of ourselves that is always to some extent different than any other mirror. Some are more precise reflection of the actual molecules that we are really composed of while others are more "kind" to our imperfections, physical and otherwise. And of course, just for fun, there are the hall of mirrors distorting mirrors that show us grotesquely different than reality and those are just that