Thank you for taking the time to exhaustively reply.
I would like to know what you are ultimately saying:
- Logic says that periodic continence or “NFP” is wrong and should not be allowed, but ABC is not wrong and should be allowed?
OR
- Logic says that “NFP” AND “ABC” are both wrong, and for similar reasons?
We might be at an impasse. I believe it is of utmost important to assume that the Church’s infallible teachings are always sound, and will upon scrutiny be found to be in absolute conformity to God’s logic. When seeking to understand an infallible teaching that does not seem to follow God’s logic, I believe it is imperative to come at it from the standpoint that somehow I (the human, non-divine one) am somehow wrong in the way I am following the logic. My study from that point on is to try and learn how I am wrong, and to pray for the understanding to see how I am wrong. With respect, Kbachler, it seems that you are coming at the teaching from the standpoint that you have a complete grasp on God’s logic, and that since Church teaching does not hold up against your understanding of God’s logic, it must be wrong.
I did not mean to imply that we should not even try to understand Truth, but that we should not think that mere acquiring of knowledge and facts is enough to solve every problem.
If you are referring to the case of Galileo when you say that the Church has based some teachings on faulty science,
please see this article from Catholic.com for a short explanation, specifically the part headed “Infallibility”.
kbachler:
This assumption is highly questionable. It is certainly an important end. That it is PRIMARY is at best, highly doubtful.
This is demonstrated by observing physical changes that occur with and following the marital act, and the impact of those changes on a human body. Specifically, there are important changes that significantly benefit a human, and in addition benefit bonding and intimacy in a marriage, WHETHER OR NOT there is conception.
Consequently, it is fairly clear that these beneficial changes are “more primary” than conception, since they are beneficial and basically occur whether or not conception does.
Therefore, the Church’s basic premise is incorrect. Any deduction from that premise is therefore also likely to be incorrect.
The fact that the marital act brings with it “physical changes” (I assume you mean endorphins and hormones? I don’t know much about that) is not a point that the Church seeks to deny or even minimize in any way. She teaches that the reason for these ("mutual benefit of the spouses) is to contribute to the overall purpose of marriage: to bring the spouses and the children to heaven. To call procreation the primary end of the marital act is not to change this in any way. Consequently, it is not clear to me why you would deduce that the bonding is primary, and that the Church’s teachings on ABC and NFP are therefore wrong.
kbachler:
Arguments to the contrary are based on what God actually created, and reflect the reality of that creation. Therefore, to call these arguments fallible runs the risk of calling God fallible. Are you certain this is what you wish to do?
The Church does not teach infallibly based on your idea of what God actually created, and on how you (and others who might agree with you) see the reality of God creation. It is precisely because we humans have such a hard time agreeing and seeing things correctly that God gave the Church the gift of Infallibility in matters of Faith and Morals. I call your arguments (and mine for that matter) fallible because they come from just you, a human, and they do not reflect the Church’s teaching, which we believe as faithful Catholics, comes from God. We may seek to understand that teaching. My arguments are only True insofar as the conform to the true teaching of the Church. I welcome any correction that helps me conform myself and my understandings more closely to Church teaching. Right now, I am simply repeating what I understand from Church teaching, and it makes sense to me and my observations and information and experience.
IOW, what you are claiming as obvious based on logic and science, I do not agree that it is obvious. I do not see where the Church is teaching anything in this matter that in any way contradicts science.
kbachler:
Although the purpose of the teaching is a conclusion with respect to faith and morals, the Church’s underlying argument states assumptions based on health, medicine, science and other factors which are objectively measurable.
Again, you’re coming at it backwards. First, we accept the infallibility of the Church in this matter. Then we seek to understand how the physical world conforms to the teaching. Because it does. God does not contradict Himself, as you have noted. Except that, following the example of the great Church fathers and Doctors, instead of attempting to conform God’s infallible teachings to our understanding of the physical world, we must instead conform our understanding of the physical world to God’s infallible teaching. We cannot afford to do it any other way, because we are so prone to error. The infallibility of the Church in matters of Faith and Morals is a great blessing that God has given us, and can only lead us to a deeper and more truthful understanding about the entirety of His creation.
kbachler:
Agreed.

But we must look for God’s truth on this matter FIRST as coming from the mouth of His Church. Christ and His Church are One. So to question the Truth of the words of the Church is to question the Truth of the words of Christ.