Say a man embarrassed his coworker by revealing the coworker's mistake. Then, the person became upset about it and their relation went sour. Whose fault is this? Many people look at others' mistakes rather than check into their own faults. The person who made a mistake may have ill feelings toward the person who revealed his mistake, while the other may think, "I only talked about what he did, but he is so narrow-minded." Even when you find the other's 99 mistakes, you had better try to discover your own. This is a really beautiful heart.