[Mr. Lucky]

Luther's personal peccadilloes are no more a part of Lutheran doctrine than, say, Alexander VI’s are of Roman Catholic. For what it's worth, Luther was satirically pointing out that Pope Leo X had no training in theology. (Luther didn't think much of Leo after the Pope claimed the right to order Luther killed).

[B-Chan]

Sigh. I’ll explain it again in seventh-grade terms.

Luther’s error was in thinking that he (and other individual believers) had the ability to infallibly define the teaching of the Christian faith for himself instead of submitting himself to the teaching of the Bishop of Rome and the bishops in union with him. He became “as God, knowing good and evil” by his own reason instead of humbly following the teaching given orally from our Lord to His Apostles and from them to us through their successors, the pope and bishops of the Church.