“The universality of reason is a momentous realization, because it defines a place for morality. If I appeal to you do do something that affects me—to get off my foot, or not to stab me for the fun of it, or to save my child from drowning—then I can't do it in a way that privileges my interests of yours if I want you to take me seriously (say, by retaining my right to stand on your foot, or to stab you, or to let your children drown). I have to state my case in a way that would force me to treat you in kind. I can't act as if my interests are special just because I'm me and you're not, any more than I can persuade you that the spot I am standing on is a special place in the universe just because I happen to be standing on it.You and I ought to reach this moral understanding not just so we can have a logically consistent conversation but because mutual unselfishness is the only way we can simultaneously pursue our interests. You and I are both better off if we share our surpluses, rescue each other's children when they get into trouble, and refrain from knifing each other than we would be if we hoarded our surpluses while they rotted, let each other's children drown, and feuded incessantly. Granted, I might be a bit better off if I acted selfishly at your expense and you played the sucker, but the same is true for you with me, so if each of us tried for these advantages, we'd both end up worse off. Any neutral observer, and you and I if we could talk it over rationally, would have to conclude that the state we should aim for is the one where we both are unselfish.Morality, then, is not a set of arbitrary regulations dictated by a vengeful deity and written down in a book; nor is it the custom of a particular culture or tribe. It is a consequence of the interchangeability of perspectives and the opportunity the world provides for positive-sum games.”

“The more you think about and interact with other people, the more you realize that it is untenable to privilege your interests over theirs, at least not if you want them to listen to you. You can’t say that my interests are special compared to yours any more than you can say that the particular spot that I am standing on is a unique part of the universe because I happen to be standing on it that very minute.”

“Morality, then, is not a set of arbitrary regulations dictated by a vengeful deity and written down in a book; nor is it the custom of a particular culture or tribe. It is a consequence of the interchangeability of perspectives and the opportunity the world provides for positive-sum games.”

“We tried so hard. We were always trying to help each other. But not because we were helpless. He needed to get things for me, just as I needed to get things for him. It gave us purpose. Sometimes I would ask him for something that I did not even want, just to let him get it for me. We spent our days trying to help each other help each other. I would get his slippers. He would make my tea. I would turn up the heat so he could turn up the air conditioner so I could turn up the heat.”

“Venus, I’m sorry that you’ve gone on minding that I didn’t let you drive me to O’Hare. “That’s what we do,” you said: “We drive each other to and from the airport.” Do you realize how rare that is? No one does it anymore, not even newlyweds. All right – it was selfish of me to decline. I said it was because I didn’t want to say goodbye to you in a public place. But I think it was the asymmetry of it that was really troubling me. You and I, we drive each other to and from the airport. And I didn’t want a to when I knew there wouldn’t be a from.”

“Simon: You're in a dangerous line of work, Jayne. Odds are you'll be under my knife again, often. So I want you to understand one thing very clearly: No matter what you do or say or plot, no matter how you come down on us, I will never, ever harm you. You're on this table, you're safe... 'cause I'm your medic. And however little we may like or trust each other, we're on the same crew. Got the same troubles, same enemies, and more than enough of both. Now, we could circle each other and growl, sleep with one eye open, but that thought wearies me. I don't care what you've done, I don't know what you're planning on doing, but I'm trusting you. I think you should do the same. 'Cause I don't see this working any other way. River: Also, I can kill you with my brain.”