https://www.rogerebert.com/interviews/upon-reflection-andrew-haigh-on-all-of-us-strangers

The moments you realize your relationship is working with someone are when they get something so profound about you that you just want to keep hidden. They pull on that thread, they don’t judge it, and they’re soft and kind with that understanding. That’s the moment when you feel you can love this person, because they have compassion for you and you have compassion for them.