Pope Pius XI...Mortalium Animos...Federal Vision Controversy

O good discussion going on here:

http://www.calledtocommunion.com/2011/05/pope-pius-xi-addresses-the-federal-vision-controversy/

I particularly like the bluntness of this comment by the author of the article. This quote is from the "comments" section below the article:

Comment #9- "The Visible Church means “the Catholic Church.” If you are in the Catholic Church, you can be saved. If you are not in the Catholic Church, you cannot be saved. The Catholic Church is Noah’s Ark. Outside the Ark, everyone perishes.

However, this must be clarified. A baby validly baptized* in the PCA is in the Catholic Church since there is only “one baptism” and “one Church.” When the baby grows up to formally hold the heresies espoused by the PCA (e.g. rejection of transubstantiation or rejection of papacy), then he ceases to be a Catholic Christian. Saint Thomas Aquinas explains this in ST, IIIa, Q. 68, A. 9, ad 1 and ST, IIIa, Q. 69, A. 6, ad 3.

If the child holds error materially with invincible ignorance, he remains in the bosom of the Catholic Church. If he holds the heresies formally, then he has lost the Catholic Faith without which no one can please God." [u]