Thomas More was a better rationalist, which was why there was nothing in his religion that was merely local, or in that sense merely loyal. More’s mind was like a diamond also in a power like that of cutting glass; of cutting through things that seemed equally transparent, but were at once less solid and less many-sided. For the true consistent heresies generally look very clear indeed; like Calvinism then or Communism now. They sometimes even look very true; they sometimes even are very true, in the limited sense of a truth that is less than the Truth. They are at once more thin and more brittle than the diamond. For a heresy is not often a mere lie; as Thomas More himself said, “Never was there a heretic that spoke all false.” A heresy is a truth that hides all the other truths. A mind like More’s was full of light like a house made of windows; but the windows looked out on all sides and in all directions. We might say that, as the jewel has many facets, so the man had many faces; only none of them were masks.
GK Chesterton, ST. THOMAS MORE