He believed that the relation of the church to God was that the church held the divine office of the ministry of the Gospel. The universal priesthood was for Melanchthon as for Luther no principle of an ecclesiastical constitution, but a purely religious principle. In accordance with this idea Melanchthon tried to keep the traditional church constitution and government, including the bishops. He did not want, however, a church altogether independent of the state, but rather, in agreement with Luther, he believed it the duty of the secular authorities to protect religion and the church. He looked upon the consistories as ecclesiastical courts which therefore should be composed of spiritual and secular judges, for to him the official authority of the church did not lie in a special class of priests, but rather in the whole congregation, to be represented therefore not only by ecclesiastics, but also by laymen. Melanchthon in advocating church union did not overlook differences in doctrine for the sake of common practical tasks.