Moses de Tordesillas did not find his part in the discussion too difficult. The apostate John of Valladolid laid stress on the proposition that the dogmas of Christianity--the Messianic claim, the Divinity and Incarnation of Jesus, the Trinity, and the Virginity of the "Mother of God"--could be demonstrated from the Old Testament. It was consequently not difficult for his Jewish opponent to confute his arguments. After four debates John was obliged to abandon his task, vanquished. This, however, did not conclude the matter. A pupil of the apostate, Abner-Alfonso, appeared soon after, and challenged Moses de Tordesillas to a debate on the Talmud and Agadic texts. In case of refusal, he threatened publicly to impeach the Talmud as the source of anti-Christian sentiments. Moses was again forced to meet a series of silly assertions and charges, and to drag himself through the thorny length of another controversy. By the advice of the Avila community, he committed to writing the principal arguments used in these discussions under the title, "Ezer ha-Emuna," and sent them to his Toledan brethren for use under similar circumstances. Moses de Tordesillas' disputations, notwithstanding the difficulties of his position, were characterized by calmness and equanimity. Not a word of abuse or invective escaped him, and he counseled his Toledo brethren not to permit themselves to be tempted by their zeal to vexatious expressions, "for it is a fact," he said, "that the Christians possess the power and disposition to silence truth by force." Toledo, formerly recognized as the teacher of Jewry, was now obliged to play the part of pupil, and follow formularies in the disputations to which its members might be invited.