###Answer the question from the input provided. Please answer from input only.

###Input: Luther justified his opposition to the rebels on three grounds. First, in choosing violence over lawful submission to the secular government, they were ignoring Christ's counsel to "Render unto Caesar the things that are Caesar's"; St. Paul had written in his epistle to the Romans 13:1–7 that all authorities are appointed by God and therefore should not be resisted. This reference from the Bible forms the foundation for the doctrine known as the Divine Right of Kings, or, in the German case, the divine right of the princes. Second, the violent actions of rebelling, robbing, and plundering placed the peasants "outside the law of God and Empire", so they deserved "death in body and soul, if only as highwaymen and murderers." Lastly, Luther charged the rebels with blasphemy for calling themselves "Christian brethren" and committing their sinful acts under the banner of the Gospel.

Without Luther's backing for the uprising, many rebels laid down their weapons; others felt betrayed. Their defeat by the Swabian League at the Battle of Frankenhausen on 15 May 1525, followed by Müntzer's execution, brought the revolutionary stage of the Reformation to a close. Thereafter, radicalism found a refuge in the anabaptist movement and other religious movements, while Luther's Reformation flourished under the wing of the secular powers.

Martin Luther married Katharina von Bora, one of 12 nuns he had helped escape from the Nimbschen Cistercian convent in April 1523, when he arranged for them to be smuggled out in herring barrels. "Suddenly, and while I was occupied with far different thoughts," he wrote to Wenceslaus Link, "the Lord has plunged me into marriage." At the time of their marriage, Katharina was 26 years old and Luther was 41 years old.

On 13 June 1525, the couple was engaged with Johannes Bugenhagen, Justus Jonas, Johannes Apel, Philipp Melanchthon and Lucas Cranach the Elder and his wife as witnesses. On the evening of the same day, the couple was married by Bugenhagen. The ceremonial walk to the church and the wedding banquet were left out, and were made up two weeks later on 27 June.

Some priests and former religious had already married, including Andreas Karlstadt and Justus Jonas, but Luther's wedding set the seal of approval on clerical marriage. He had long condemned vows of celibacy on Biblical grounds, but his decision to marry surprised many, not least Melanchthon, who called it reckless. Luther had written to George Spalatin on 30 November 1524, "I shall never take a wife, as I feel at present. Not that I am insensible to my flesh or sex (for I am neither wood nor stone); but my mind is averse to wedlock because I daily expect the death of a heretic." Before marrying, Luther had been living on the plainest food, and, as he admitted himself, his mildewed bed was not properly made for months at a time.



###Question: What was Luther's marriage seen as by others?

###Answer: {'answer':'seal of approval'}