How we cite our quotes: All quotations are from A Man for All Seasons.
Quote #4
DUKE: And who are you? A lawyer! And a lawyer's son! We're supposed to be the proud ones, the arrogant ones. We've all given in! Why must you stand out? Goddamn it, man! It's disproportionate! You'll break my heart.
MORE: No one is safe, Howard, and you have a son. We'll end our friendship now.
DUKE: For friendship's sake?
MORE: Yes.
Tragically, More has to abandon one of his only true friends, for both their sakes. The Duke can't be sympathetic to a traitor, and Thomas simply can't swear to the oath as the Duke has done.
Quote #5
MORE: We've had a quarrel since the day we met. Our friendship was mere sloth.
DUKE: You can be cruel when you want, but I've always known that.
More actually has to verbally attack the Duke (he even provokes him to try to punch him shortly thereafter) and try to hurt his feelings just to keep the Duke safe and give himself the space to continue following his principles. It's painful and is one of the real obstacles in More's journey toward martyrdom—more of an obstacle than any of Cromwell's machinations.
Quote #6
DUKE: Oh, confound all this! I'm not a scholar. I don't know if the marriage was lawful or not... but damn it, Thomas, look at these names. Why can't you do as I did and come with us for fellowship?
MORE: And when we die, and you are sent to heaven for doing your conscience... and I am sent to hell for not doing mine, will you come with me, for fellowship?
Does More think the Duke is "doing his conscience"? There might be a little irony in his suggestion that the Duke will go to heaven for being true to himself, while More would be at rest. But, at the same time, the Duke seems like a good guy—just not someone who's overly concerned about whether the Catholic Church is the true church or not.