Why did Ray Bradbury use the quote Play the man master Ridley we shall this day light such a candle by God's grace in England as I trust shall never be put out in his novel?

Later Captain Beatty reveals the context of the quote, explaining, "A man named Latimer said that to a man named Nicholas Ridley, as they were being burnt alive at Oxford, for heresy, on October 16, 1555." (pg. 40) This indicates the woman's willingness to die for her books, and that the reason she was being burned was for heresy just as Latimer and Ridley were. Beatty's ability to explain this also adds depth to his character, as he must have read that information to recall what it came from.