"Let the laity not imagine that their pastors are always such experts, that to every problem which arises, however complicated, they can readily give them a concrete solution, or even that such is their mission. Rather, enlightened by Christian wisdom and giving close attention to the teaching authority of the Church,let the laity take on their own distinctive role."

"....among both clerical and lay, some have been unfaithful to the Spirit of God during the course of many centuries; in the present age, too, it does not escape the Church how great a distance lies between the message she offers and the human failings of those to whom the Gospel is entrusted. Whatever be the judgment of history on these defects, we ought to be conscious of them, and struggle against them energetically, lest they inflict harm on spread of the Gospel."
On the role of The Church in the Modern World (Ch 4 para 43)