Do you ask what moral obligation I owe to my fellow men? None—except the
obligation I owe to myself, to material objects and to all of existence:
rationality. I deal with men as my nature and theirs demands: by means of
reason. I seek or desire nothing from them except such relations as they care
to enter of their own voluntary choice. It is only with their mind that I can
deal and only for my own self-interest, when they see that my interest
coincides with theirs. When they don’t, I enter no relationship; I let
dissenters go their way and I do not swerve from mine. I win by means of
nothing but logic and I surrender to nothing but logic. I do not surrender my
reason or deal with men who surrender theirs.