91. Unlike the Benedictine monks, each of the friars was under the command not only of the head of his particular monastery, but also of the "general" of the whole order. Like a soldier, he was liable to be sent by his commander upon any mission that the work of the order demanded. The friars indeed regarded themselves as soldiers of Christ. Instead of devoting themselves to a life of contemplation apart from the world, like the earlier monks, they were accustomed and required to mix with all classes of men. They must be ready to dare and suffer all in the interest of their work of saving not only themselves but their fellow-men. [Sidenote: Contrast between the Dominicans and the Franciscans.] The Dominicans were called the "Preaching Friars" and were carefully trained in theology in order the better to refute the arguments of the heretics. The pope delegated to them especially the task of conducting the Inquisition. They early began to extend their influence over the universities, and the two most distinguished theologians and teachers of the thirteenth century, Albertus Magnus and Thomas Aquinas, were Dominicans. Among the Franciscans, on the other hand, there was always a considerable party who were suspicious of learning and who showed far more anxiety to remain absolutely poor than did the Dominicans. Yet as a whole the Franciscans, like the Dominicans, accepted the wealth that came to them, and they, too, contributed distinguished scholars to the universities. [Sidenote: Importance and influence of the new orders.] The pope quickly recognized the importance of these new orders. He granted them successive privileges which freed them from all control of the bishops, and finally declared that they were to be bound only by their own rules. What was still more important, he gave them the right, if they were priests, to celebrate Mass everywhere, to preach and to perform the ordinary functions of the parish priests, such as hearing confession, granting absolution, and conducting burials. The friars invaded every parish, and appear to have largely replaced the parish priests. The laity believed them to be holier than the secular clergy and therefore regarded their prayers and ministrations as more efficient. Few towns were without a gray friars' (Franciscan) or a black friars' (Dominican) cloister; few princes but had a Dominican or a Franciscan confessor. [Sidenote: Opposition of the secular clergy.]