From an essay with the cheery title, "Why Our Problems Are Insoluble" --
Saint Thomas More is to my mind among the greatest statesmen because he could, with sublime courage, articulate the limits of political power. He was martyred because he delineated them in the presence of a great tyrant. He was not executed because the monster, Henry Tudor, was stupid or a hothead. He was executed because Henry was intelligent enough to see that More had got to the crux of the matter. He knew, in effect, that More was a saint, and that other people could see that he was.
quote context: http://pllqt.it/R590Ge