Luther borrowed from the humanists the sense of individualism, that each man can be his own priest (an attitude likely to find popular support considering the rapid rise of an educated urban middle class in the North), and that the only true authority is the Bible, echoing the reformist zeal of the Conciliar movement and opening up the debate once again on limiting the authority of the Pope. While his ideas called for the sharp redefinition of the dividing lines between the laity and the clergy, his ideas were still, by this point, reformist in nature. Luther's contention that the human will was incapable of choosing good on its own, however, resulted in his rift with Erasmus finally distinguishing Lutheran reformism from humanism. On this issue, Luther sided with Thomistic scholarship (sometimes termed the "schola antiqua" or "old school") and Erasmus with the "schola moderna" or "new school," which especially relied on Scotist and Franciscan epistemology. Luther did not consistently identify with one camp or another for nearly his whole career. Instead, when debating he tactically took positions allying himself with one camp or the other on issues as it suited his overall purpose during debates. It was especially his intention to guard against the threat he feared the voluntarism of the increasingly popular schola moderna posed to the doctrine of justification.