Meanwhile, William of S. Amour, the celebrated philosopher and doctor of the University, was endeavouring to turn the mendicant Orders out of Paris by getting people to withhold their alms, and by forbidding the members of these Orders to attend the secular lectures.
He also endeavoured to fix the authorship of an heretical work, called "The Everlasting Gospel," on the Franciscans and Dominicans.
But he himself had written a book, called "Perils of the last times." This the king sent by two doctors of theology for the pope's examination. The University sent a deputation to make the Holy Father acquainted with "The Everlasting Gospel." William was leader of this deputation. S. Thomas was sent to defend his order; S. Bonaventura that of S. Francis. S. Thomas, after examining the "Perils," reported to the Dominican chapter that "God had given him grace to discover whatever is false, captious, erroneous, impious in it, and that after the holy See had pronounced judgment on it, the faithful would only notice it to condemn it." In a few days the saint prepared his defence of the order, and his answer to the "Perils." He pleaded before the pope and sacred college with such success as to gain their applause.
When he had done, the four cardinals gave in their report on the "Perils," which stated that it was full of false doctrine, injurious to the authority of the pope and the bishops, and to the honour of several religious orders approved by the holy See. After examining the report, the pope condemned the "Perils" by a bull, dated October 5th, 1256, and ordered the book to be burnt. The deputation from the University arrived after the work of their leader had been burnt. They endeavoured to obtain a revocation of the condemnation, but, instead, they were compelled to take pen and themselves subscribe it. They swore, moreover, to receive into the body of the University the Dominicans and Franciscans, especially SS. Thomas and Bonaventura. William of S. Amour refused to comply, and being forbidden to enter France, retired to his estate in Burgundy. A few years later he was allowed to return to Paris. He died in 1270. It was partly in reply to William's attack on the religious orders, that S. Thomas wrote his Opusculum, "Against those who attack religion and the worship of God," and that "Against those who hinder men from entering religion," which are the best defence and exaltation of monastic principles ever penned.[32]