"Who," in St. Paul's words, "is sufficient for these things?" Who, even with divine aid, shall successfully administer offices so independent of each other, so divergent, and so conflicting? What line of conduct, except on the long, the very long run, is at once edifying, expedient, and true? Is it not plain, that, if one determinate course is to be taken by the Church, acting at once in all three capacities, so opposed to each other in their idea, that course must, as I have said, be deflected from the line which would be traced out by any one of them, if viewed by itself, or else the requirements of one or two sacrificed to the interests of the third? What, for instance, is to be done in a case when to enforce a theological point, as the Schools determine it, would make a particular population less religious, not more so, or cause riots or risings? Or when to defend a champion of ecclesiastical liberty in one country would encourage an Anti-Pope, or hazard a general persecution, in another? or when either a schism is to be encountered or an opportune truth left undefined?

All this was foreseen certainly by the Divine Mind, when He committed to his Church so complex a mission; and, by promising her infallibility in her formal teaching, He indirectly protected her from serious error in worship and political action also. This aid, however, great as it is, does not secure her from all dangers as regards the problem which she has to solve; nothing but the gift of impeccability granted to her authorities would secure them from all liability to mistake in their conduct, policy, words and decisions, in her legislative and her executive, in ecclesiastical and disciplinarian details; and such a gift they have not received. In consequence, however well she may perform her duties on the whole, it will always be easy for her enemies to make a case against her, well founded or not, from the action or interaction, or the chronic collisions or contrasts, or the temporary suspense or delay, of her administration, in her three several departments of duty,—her government, her devotions, and her schools,—from the conduct of her rulers, her divines, her pastors, or her people.

Lectures on the Prophetical Office of the Church
Via Media, Volume 1