I ground my faith upon Jesus Christ, and by Him I steadfastly believe to be saved, as is taught in the Catholic Church through all Christendom, and promised to remain with Her unto the world's end, and hell gates shall not prevail against it: and by God's assistance I mean to live and die in the same faith; for if an angel come from heaven, and preach any other doctrine than we have received, the Apostle biddeth us not to believe him. Therefore, if I should follow your doctrine, I should disobey the Apostle's commandment.
--Saint Margaret Clitherow while imprisonedCatholic