The great good that comes from an examination of this controversy is a realization of the fact that the teaching of the Catholic Church is authoritative in a unique sense. Ultimately it is Our Lord Himself who teaches within the Church, and the doctrines set forth in His name and by His authority by His ministers demand full acceptance on the part of all subjects of the Church. When the ecclesia docens acts, it inevitably binds the consciences of all Christians to accept its teachings and to manifest that acceptance. It forbids, by the very nature of its activity, any inaccurate statement about the doctrine which has been proposed, or any refusal to receive that doctrine as the personal tenet of the persons to whom it is addressed. The man who rejects that teaching, rejects Our Lord Himself.

Ultimately, we must not allow ourselves to forget, the perfection of the Church’s teaching authority is such that the Church itself does not need to add any other jurisdictional act to its authoritative condemnation of some teaching at variance with that doctrine in order to impose upon its subjects the obligation to accept that declaration with a true and inward assent, and in order to forbid, under penalty of offense against God Himself, any outward expression of opposition to what the Church has taught. The teaching power of the Church is inherently and essentially jurisdictional. The man who is subject to the authority of the Church has a duty before God of accepting the acts of the ecclesiastical magisterium with a sincere and genuine inward assent. He is obliged to manifest that acceptance, and to refrain from any oral or written opposition to or misinterpretation of what Our Lord, acting through the ecclesia docens, has proposed authoritatively for his guidance in His Church.  http://www.strobertbellarmine.net/forums/viewtopic.php?f=2&t=691&p=7510