But there was in this young man a fire which nothing could extinguish. His ruling passion was the desire to do every thing in his power which he believed calculated to save mankind and to glorify God. He had a wonderful fervency of spirit which prompted him to perpetual efforts, even to what many would, perhaps, call an excess of piety and charity. This has often been the case with the most eminent Christians. The words of Scripture were true of him: _The zeal of thine house hath eaten me up_. Scarcely had he promised Enzinas to be more prudent, when he set out with a few friends for Ratisbon, where the Imperial Diet had been opened in April (1541), and where Charles the Fifth then was. The prince was showing, as they said, much favor towards the Protestants. He desired, in fact, to obtain the support of the evangelical party for the war against the Turks, who were attacking Austria.[98] San Romano, therefore, believed the moment to be favorable for attempting the conversion of Charles. He did not mention his design to his companions. While, however, he went on his way in silence, he reasoned within himself that the truth of the Gospel was obvious, and that if the emperor, whom the Spaniards regarded as master of the world, should once receive it, he would spread it abroad throughout Christendom, and throughout the whole world. And he thought that if vulgar fears should hinder him from speaking to Charles, he would be taking upon himself an immense responsibility. No sooner had he arrived at Ratisbon than he requested and obtained an audience of the emperor. He entreated him to make use of his power to repress the fanatical proceedings of the Inquisition. 'Sire,' said he, 'the true religion is to be found amongst the Protestants, and the Spaniards are sunk in abominable errors. Receive worthily the true doctrine of the Son of God, which is proclaimed so clearly in the Germanic churches. Repress all cruelty, re-establish the true worship of God in your states, and cause the doctrine of salvation to be proclaimed throughout the world.' Long and bold as San Romano's discourse was, the emperor listened to it very patiently. It was not mere ranting.[99] 'I have this matter much at heart,' replied Charles, pleasantly, 'and I will spare no pains for it.' San Romano withdrew full of hope.