In his first German booklet against Emser, viz. his “An den Bock zu Leyptzck” (1521),[1248] he plays on the motto of Emser’s coat-of-arms “Beware of the goat.” There was really no call for Emser to inscribe these words on his note-paper, for from his whole behaviour there was no doubt that he was indeed a goat, and also that he could “do no more than butt.” Luther’s reply to all his threats would be: “Dear donkey, don’t lick! But God save the poor nanny-goats, whose horns are wrapped in silk, from such a he-goat; as for me, so God wills, there is no fear. Have you never heard the fable of the ass who tried to roar as loud as the lion? I myself might have been afraid of you had I not known you were an ass,” etc. It is certainly not easy to believe his assertion, that it was only against his will that he had recourse to all this derision which he heaped on his adversaries in religious matters of such vital importance. He has it that his words, “though maybe biting and sarcastic,” are really “spoken from a heart that is breaking with grief and has been obliged to turn what is serious into abuse.”[1249] As a matter of fact the temptation to use just such weapons was too great, and the prospect of success too alluring for us to place much reliance in such an assurance. His “grief” was of quite another kind. At a later date his humour, or rather his caustic and satirical manner of treating his opponents, looked to him so characteristic of his way of writing, that as he said, it would be quite easy to tell at a glance which were the polemical tracts due to his pen, even though they did not bear his name. This was his opinion of his “satirical list” of the relics of the Cardinal of Mayence.[1250] Writing of this work to his friend Jonas he says: “Whoever reads it and has ever been familiar with my ideas and my pen will say: Here is Luther; the Cardinal too will say: This is the work of that scamp Luther!... But never mind; if they pipe then I insist on dancing, and, if I survive, I hope one day to tread a measure with the bride of Mayence [the Cardinal].” He had still “some sweet tit-bits” which he would like “to lay on her red and rosy lips.”[1251] This last quotation may serve as a specimen of the rough humour found in his controversial letters. The reader already knows how the Papacy had to bear the brunt of such jests and of an irony which often descends to the depths of vulgarity. (Above, vol. iii., p. 232-235; vol. iv., pp. 295 f., 304 f, 318 ff.) But it was not only in his polemics that his jests came in useful. The jovial tone which often characterises his domestic life, the humour that seasons his Table-talk (even though too often it oversteps the bounds of the permissible) and makes itself felt even in his business letters and intimate correspondence with friends, appears as Luther’s almost inseparable companion, with whose smile and whose caustic irony he cannot dispense.