But these were days in which in a university everyone was expected to talk and teach, and so Paracelsus began lecturing; and then the weakness which was mingled with his strength showed itself. He began by burning openly the books of Galen and Avicenna, and declared that all the old knowledge was useless. Doctors and students alike must begin over again with him. The dons were horrified. To burn Galen and Avicenna was as bad as burning the Bible. And more horrified still were they when Paracelsus began lecturing, not in the time-honoured dog-Latin, but in good racy German, which everyone could understand. They shuddered under their red gowns and hats. If science was to be taught in German, farewell to the Galenists' formulas, and their lucrative monopoly of learning. Paracelsus was bold enough to say that he wished to break up their monopoly; to spread a popular knowledge of medicine. "How much," he wrote once, "would I endure and suffer, to see every man his own shepherd--his own healer." He laughed to scorn their long prescriptions, used the simplest drugs, and declared Nature, after all, to be the best physician--as a dog, he says, licks his wound well again without our help; or as the broken rib of the ox heals of its own accord. Such a man was not to be endured. They hated him, he says, for the same reason that they hated Luther, for the same reason that the Pharisees hated Christ. He met their attacks with scorn, rage, and language as coarse and violent as their own. The coarseness and violence of those days seem incredible to us now; and, indeed, Paracelsus, as he confessed himself, was, though of gentle blood, rough and unpolished; and utterly, as one can see from his writings, unable to give and take, to conciliate--perhaps to pardon. He looked impatiently on these men who were (not unreasonably) opposing novelties which they could not understand, as enemies of God, who were balking him in his grand plan for regenerating science and alleviating the woes of humanity, and he outraged their prejudices instead of soothing them. Soon they had their revenge. Ugly stories were whispered about. Oporinus, the printer, who had lived with him for two years, and who left him, it is said, because he thought Paracelsus concealed from him unfairly the secret of making laudanum, told how Paracelsus was neither more nor less than a sot, who came drunk to his lectures, used to prime himself with wine before going to his patients, and sat all night in pothouses swilling with the boors.