“One of the early Fathers said, ‘He that hath not suffered, what doth he know?’ There is a lack even of knowledge in the one who has not dealt rightly with some kind of suffering. Some people are never themselves till they have had great sorrow. Sorrow must enter in. It is not the final thing. But something has happened to human beings, so that now it is an absolute necessity. Some impurities have to be washed away by suffering.”
Vincent McNabb, OP, The Craft of Suffering (1936), 37-8.