[…] there are times when we are lying in bed and I look over and sort of have a start. Because I realize here is this other person who is separate and different and has different memories and backgrounds and thoughts and feelings. It’s that tension between familiarity and mystery that makes for something strong, because, even as you build a life of trust and comfort and mutual support, you retain some sense of surprise or wonder about the other person.

— Michelle Obama, A Couple in Chicago, The New Yorker, 1996 (via)