This was the faith for which He was ever on the watch, and which He never saw without marking, and, in those who needed anything from Him, richly rewarding. From The People's New Testament , B.W. Johnson, 1891. He could assert that he forgave sins without blasphemy. If they possessed power to forgive sins they would have power also to relieve the body of the physical consequences of sin. First United Methodist Church, San Diego, CA, 2000.
Guilt is good when it motivates change.
That's what it is for. Guilt is good if it gets you to live a better life than the life that you are living now. The Interface of Rhetoric and Culture in Mark's Gospel. Questions score points, draw blood, and shame opponents. The same interpretation applies equally to the phenomenon of answering a question with a counter-question, which also is an aggressive weapon.