Not quite what the headline promises, but a way of drawing attention to Benedict's little chapter on faults committed in the oratory. He is writing not only about carelessness in choir (which can indeed lead to tantrums!) but about pride in general and the difficulty many of us have in admitting we have made a mistake. It is easier to flounce out of the room, maintain a hard silence or utter what is intended as a withering remark than simply, humbly and gently admit that we might just conceivably, on this one single occasion, of course, have been (perhaps) a teensy-weensy-bit wrong.