“To be happily married, as I've been fortunate enough to be, is to be a partner in a conversation that can last a full adult life. To have a true friend is to be able to test your hypotheses against someone who's receptive, but who won't give ground forever, and then let your friend try his wares out on you. At its best, friendly conversation is about giving up all claims to property and priority and engaging in collaboration--so that, at least for the two of you, something like an improvised musical composition in two parts is taking place. You do some rhythm to his lead; he lays down a bass line when you want to run the thing out into space. You both wind up saying things and thinking things that, alone, you never could have. This kind of hybrid mixing, this collaborative creation, is greatly to be treasured: it's one of the best parts of life.”