I came across this invented word which means:
sonder
n. the realization that each random passerby is living a life as vivid and complex as your own
The accompanying video is nicely made.
Sonder from John Koenig on Vimeo.
I won’t be dropping sonder in conversation anytime soon. But–in my more contemplative moments–I do survey the people about me and wonder how they got there, and what stories they have to tell.