But Luther was strong enough to resist it, and to despise it. He saw it was an imposition, which only barbarous and ignorant ages had permitted. Moreover, he perceived that there was now no alternative but victory or death; that, in the great contest in which he was engaged, retreat was infamy. Nor did he wish to retreat. He was fighting for oppressed humanity, and death even, in such a cause, was glory. He understood fully the nature and the consequence of the struggle. He perceived the greatness of the odds against him, in a worldly point of view. No man but a Luther would have been equal to it; no man, before him, ever had successfully rebelled against the pope. It is only in view of this circumstance, that his intrepidity can be appreciated. What did the Saxon monk do, when the papal bull was published? He assembled the professors and students of the university, declared his solemn protest against the pope as Antichrist, and marched in procession to the gates of the Castle of Wittemberg, and there made a bonfire, and cast into it the bull which condemned him, the canon law, and some writings of the schoolmen, and then reentered the city, breathing defiance against the whole power of the pope, glowing in the consciousness that the battle had commenced, to last as long as life, and perfectly secure that the victory would finally be on the side of truth. This was in 1520, on the 10th of December. The attention of the whole nation was necessarily drawn to this open resistance; and the sympathy of the free thinking, the earnest, and the religious, was expressed for him. Never was popular interest more absorbing, in respect to his opinions, his fortunes, and his fate. The spirit of innovation became contagious, and pervaded the German mind. It demanded the serious attention of the emperor himself. [Sidenote: The Diet of Worms.] A great Diet of the empire was convened at Worms, and thither Luther was summoned by the temporal power. He had a safe-conduct, which even so powerful a prince as Charles V. durst not violate. In April, 1521, the reformer appeared before the collected dignitaries of the German empire, both spiritual and temporal, and was called upon to recant his opinions as heretical in the eyes of the church, and dangerous to the peace of the empire. Before the most august assembly in the world, without a trace of embarrassment, he made his defence, and refused to recant. "Unless," said he, "my errors can be demonstrated by texts from Scripture, I will not and cannot recant; for it is not safe for a man to go against his conscience. Here I am. I can do no otherwise. God help me! Amen."