The malice which shone through this treatise roused Luther's indignation, while the thought that the blow was given by an old friend, was still more distressing. However, he must sacrifice his affections in defending the truth. Luther unbosomed his heart and its sadness, in a letter to Egranus, pastor at Zwickau--"I am called in the _Obelisks_ a venomous man, a Bohemian, a heretic, seditious, insolent, and presumptuous.... I say nothing of milder epithets, such as sleepy, imbecile, ignorant, contemner of the sovereign pontiff, etc. This book is full of the grossest insults, and yet the author is a distinguished man, alike remarkable for learning and talent; and (it is this that grieves me most) a man with whom I had recently contracted a close friendship,[436] viz., John Eck, doctor in theology, and chancellor of Ingolstadt, a celebrated and illustrious author. Did I not know the thoughts of Satan, I would be astonished at the furious manner in which this man has broken off a friendship at once so pleasant and so recent;[437] and this without giving me any warning--without writing or saying a single word." [436] "Et quod magis urit, antea mihi magna recenterque contracta amicitia conjunctus." (Luth., Ep. i, p. 100.) [437] "Quo furore ille amicitias recentissimas et jucundissimas solveret." (Ibid.) But if Luther's heart be wounded, his courage is not destroyed. On the contrary, he girds himself for the combat. "Rejoice, my brother," says he to Egranus, whom a violent enemy had also attacked; "rejoice, and be not alarmed at all these flying leaves. The more furious my adversaries become, the more I advance. I leave the things which are behind, that they may bark after them, and follow those which are before, that they may in like manner bark after them in their turn." Eck felt how shameful his conduct had been, and endeavoured to justify it in a letter to Carlstadt, in which he calls Luther "their common friend;" and throws all the blame on the Bishop of Eichstadt, at whose instigation he pretended that he had written the work. His intention, he said, was not to publish the _Obelisks_; but for this he would have had more regard for the friendship subsisting between him and Luther; and he requested that Luther, instead of coming to open rupture with him, would turn his arms against the theologians of Frankfort. The professor of Ingolstadt, who had not feared to strike the first blow, began to be alarmed at the power of the opponent whom he had imprudently attacked, and would willingly have evaded the contest. It was too late.