UNDERSHAFT [determinedly] No: none of that. You must keep the true faith of an Armorer, or you don't come in here.
CUSINS. What on earth is the true faith of an Armorer?
UNDERSHAFT. To give arms to all men who offer an honest price for them, without respect of persons or principles: to aristocrat and republican, to Nihilist and Tsar, to Capitalist and Socialist, to Protestant and Catholic, to burglar and policeman, to black man, white man and yellow man, to all sorts and conditions, all nationalities, all faiths, all follies, all causes and all crimes. The first Undershaft wrote up in his shop IF GOD GAVE THE HAND, LET NOT MAN WITHHOLD THE SWORD. The second wrote up ALL HAVE THE RIGHT TO FIGHT: NONE HAVE THE RIGHT TO JUDGE. The third wrote up TO MAN THE WEAPON: TO HEAVEN THE VICTORY. The fourth had no literary turn; so he did not write up anything; but he sold cannons to Napoleon under the nose of George the Third. The fifth wrote up PEACE SHALL NOT PREVAIL SAVE WITH A SWORD IN HER HAND. The sixth, my master, was the best of all. He wrote up NOTHING IS EVER DONE IN THIS WORLD UNTIL MEN ARE PREPARED TO KILL ONE ANOTHER IF IT IS NOT DONE. After that, there was nothing left for the seventh to say. So he wrote up, simply, UNASHAMED.
CUSINS. My good Machiavelli, I shall certainly write something up on the wall; only, as I shall write it in Greek, you won't be able to read it. But as to your Armorer's faith, if I take my neck out of the noose of my own morality I am not going to put it into the noose of yours. I shall sell cannons to whom I please and refuse them to whom I please. So there!
UNDERSHAFT. From the moment when you become Andrew Undershaft, you will never do as you please again. Don't come here lusting for power, young man.
CUSINS. If power were my aim I should not come here for it. YOU have no power.
UNDERSHAFT. None of my own, certainly.
CUSINS. I have more power than you, more will. You do not drive this place: it drives you. And what drives the place?
UNDERSHAFT [enigmatically] A will of which I am a part.
BARBARA [startled] Father! Do you know what you are saying; or are you laying a snare for my soul?