The book, which was published Tuesday, reveals that even when he was not ill, he inflicted pain on himself, known in Christianity as mortification, so as to feel closer to God.
"In Krakow as in the Vatican, Karol Wojtyla flagellated himself," Oder writes in the book, citing testimony from people in the late pope's close entourage while he was bishop in his native Poland and after he was elected pope in 1978.
"In his closet, among his vestments, there was hung on a clothes hanger a particular kind of belt for pants, which he used as a whip," Oder writes....