At the very time this book was appearing, an opportunity offered for testing the mettle of his courage. One of those ever-recurrent plagues that harassed former ages, before microbes were discovered, fell upon Geneva. The minister, who had volunteered to give spiritual comfort to those who were suffering with the plague in the hospital, was stricken with the dread disease, and a new volunteer was asked for. The records of the city show that Castellio, though not yet ordained, and under no obligation to take such risk, offered himself for the {91} hazardous service when the ministers of the city declined it. The ordination through human hands was, however, never to come to him, and a harder test of courage than the plague was before him. In the course of his studies he found himself compelled to take the position that the "Song of Solomon" was an ancient love poem, and that the traditional interpretation of it as a revelation of the true relation between Christ and the Church was a strained and unnatural interpretation. He also felt that as a scholar he could not with intellectual honesty agree with the statement in the Catechism that "Christ descended into Hell." Calvin challenged both these positions of Castellio, but his opposition to him was clearly far deeper than a difference of opinion on these two points. Calvin instinctively felt that the bold and independent spirit of this young scholar, his qualities of leadership, and his literary genius marked him out as a man who could not long be an easy-minded and supple subordinate. A letter which Calvin wrote at this time to his friend Viret shows where the real tension lay. "Castellio has got it into his head," he writes, "that I want to rule!" The great Reformer may not have been conscious yet of such a purpose, but there can be no question that Castellio read the signs correctly, and he was to be the first, as Buisson has said, to discover that "to resist Calvin was in the mind of the latter, to resist the Holy Ghost."[4] Calvin successfully opposed his ordination, and made it impossible for him to continue in Geneva his work as an honest scholar. To remain meant that he must surrender his right of independent judgment, he must cease to follow the line of emancipated scholarship, he must adjust his conscience to fit the ideas that were coming to be counted orthodox in the circle of the Reformed faith. _That_ surrender he could no more make than Luther could surrender to the demands of his opponents at Worms. He quietly closed up his work in the College of Geneva and went into voluntary exile, to seek a sphere of life where he might think and speak as {92} he saw the truth and where he could keep his conscience a pure virgin.