Luther formed his resolve at once on the two points required of him. He determined to obey the summons to the Diet, and, if there unconvicted of error, to refuse the recantation demanded.
The Emperor's citation was delivered to him on March 26 by the imperial herald, Kaspar Sturm, who was to accompany him to Worms. Within twenty-one days after its receipt, Luther was to appear before the Emperor; he was due therefore at Worms on April 16, at the latest.
Up till now he had continued uninterruptedly his arduous and multifarious labours, and, to use his own expression, like Nehemiah he carried on at once the work of peace and of war; he built with one hand, and wielded the sword with the other. His controversy with Catharinus he brought quickly to a conclusion. During March he finished the first part of his Exposition of the Gospel as read in church, which he had undertaken, as a peaceful and edifying work, at the request of the Elector, to whom he wrote a dedication; and he was now at work on a fervent and tender practical explanation of the _Magnificat_, which he had intended for his devoted friend, Prince John Frederick, the son of Duke John and nephew of the Elector Frederick. He addressed a short letter to him on March 31, enclosing the first printed sheets of this treatise; and the next day sent him the epilogue, addressed to his friend Link, to his reply to Catharinus, dedicated also to Link. 'I know,' he says here, 'and am certain, that our Lord Jesus Christ still lives and rules. Upon this knowledge and assurance I rely, and therefore I will not fear ten thousand Popes; for He Who is with us is greater than he who is in the world.'
On the following day, April 2, the Tuesday after Easter, he set out on his way to Worms. His friend Amsdorf and the Pomeranian nobleman Peter Swaven, who was then studying at Wittenberg, accompanied him. He took with him also, according to the rules of the Order, a brother of the Order, John Pezensteiner. The Wittenberg magistracy provided carriages and horses.
The way led past Leipzig, through Thuringia from Naumburg to Eisenach, then southward past Berka, Hersfeld, Grünberg, Friedberg, Frankfort, and Oppenheim. The herald rode on before in his coat of arms, and announced the man whose word had everywhere so mightily stirred the minds of people, and for whose future behaviour and fate friend and foe were alike anxious. Everywhere people collected to catch a glimpse of him.