The Difference Between Strangers and Friendly Acquaintances

I was playing some water basketball tonight with some friends, and some other people were nearby that wanted to join us. We introduced ourselves to each other, we learned each other's names, and we played for an hour or two. By the end, the strangers had become friendly acquaintances (the kind of people you would say hi to when you pass by). Amazing how that can happen so quickly. I am grateful for new acquaintances.