The religious controversies became more and more embittered during the year 1559. The lords of the Congregation denounced the abuses of the clergy, demanded permission to use the vulgar tongue in all public religious services as well as in the administration of the sacraments, and insisted on the admission of the lower nobles and of the people to a voice in the appointment of bishops and of pastors. To put an end to the abuses that were proving such a useful weapon in the hands of the adversaries of the Church, and at the same time to give public and formal expression to the faith of the Scottish nation, a national synod[16] met at Edinburgh (April 1559). It denounced once again the awful scandal of concubinage among the clergy, laid down useful regulations regarding preaching and the appointment of bishops, condemned plurality of benefices, nonresidence, and demands on the part of the clergy for excessive fees. To raise the standard of education among the clergy it ordained that those presented to benefices should be examined, and that each monastery should maintain some of its members at the universities. In its profession of faith the synod emphasised the Real Presence of Christ in the Eucharist, Transubstantiation, the propitiatory character of the sacrifice of the Mass, the sufficiency of Communion in one kind, the existence of a real priesthood, and purgatory, prayers for the dead, invocation of the saints, fasting, and holidays. In response to the demands of the Congregation the synod pointed out that it had not the power to change the rites and ceremonies that had been handed down for centuries, that as the Church was the definitely appointed guardian and interpreter of the Scriptures private individuals were not permitted to expound them at their will, and that in the appointment of bishops and pastors the rules laid down in canon law were quite sufficient to prevent abuses if only they were followed.