That was just his way. If it didn’t suit him to explain a thing to you, he wouldn’t do it. You might pump at him a week, it wouldn’t make no difference.

– Mark Twain

The Adventures of Huckleberry Finn, Chapter 38. Huck on Tom Sawyer. Tom will believe something because it comes out of a book, but Huck needs to know what it means. Tom won’t explain his ideas because he cannot.