See below.
Agreed.
This is a tricky thing to say apologetically, and I will give you 2 examples:
- Until very recently in Church history (Vatican II, if I am not mistaken) the Church taught that the primary end of marriage was procreation. All other ends were absolutely subordinate to the end of procreation.
Now, of course, unity of the spouses has been elevated to co-primacy.
I do not think that the ends of marriage can be termed “disciplines,” and the Church made quite firm statements for a long, long time about the primacy of procreation (a la St. Augustine’s rather extensive discussion of this in Confessions). Where this falls with respect to your statement, I am not sure.
- Again, I may be mistaken, but it is my understanding that, until the Council of Trent (so, more than half of the 2,000 year history of the Church had elapsed), sexual intercourse WAS permitted before official marriage in the case of BETROTHAL.
This is to say that sexual relations and even conception might and could “licitly” occur between a woman betrothed formally to a man, even though the actual wedding ceremony had not taken place.
Now of course, sexual intercourse before marriage is a grave mortal sin. Whether something has changed in, I am not sure, but there are other examples where it is difficult to employ the “the teaching was finally properly understood” mentality.
Perhaps someone can clear up the above two, which certainly can be my own misunderstanding.