Mac (Frederic March): Funny how two people can start from the same point and drift apart.
Henry (Spencer Tracy): It's the nature of the life process.
Mac: There use to be a mutuality of understanding and admiration between us Henry.
Why is it, my old friend, that you've moved so far away from me?
Henry: Well, all motion is relative Mac. Maybe it's you who have moved away... by standing still.