I’m sure I’ve already used this one before, but it’s one of my favorites (and I’m having trouble keeping track of what I’ve used and what I haven’t!).

We’re members of each other—all of us—everything. The difference is not whether you are or not, but whether you know you are or not. Because we’re all under each other’s influence. We’re all are affected by one another’s others lives and decisions. And there is no escape from this membership.

Wendell Berry