For couples this would be acting on their wishes to be intimate when they feel like it, not when a calendar dictates they can have sex with the least chance of getting pregnant. This places a self (name removed by moderator)osed artifical barrier between two people. It can add tension to a marraige that should not be there.
There is no artificial barrier. Only God’s natural design for hormonal fluctuation.
By your rules, if a wife after having five children in 9 years cannot have any more, you would consign her to either do that or abstain till menopause, which to me would add LOTS more tension to a marriage.
That “calendar” you condemn is really her God-given ability to recognize her own fertility. And to choose to have intercourse or not if she is not ready to conceive. Unlike animals who have no such intellect or free will, they must mate. They can’t not resist the hormonal onslaught. Doubt that and you’ve never had an army of tomcats yowling outside your house when a female cat is in heat.
the conjugal act is destined primarily by nature for the begetting of children, those who in exercising it deliberately frustrate its natural powers and purpose
Again, Acts which deliberately frustrate the natural powers and purpose of the conjugal act in its exercise…
That’s acts before, during and after the exercise of the act.
Take eating as an example.
God gave us that pleasure for the purpose of sustaining life. Now, if we eat too much, there is the chance we’ll ruin our health. We are allowed to not eat at the times of day when it would be worst for our metabolism. Every act of eating is geared to gaining every calorie possible and those who resist eating before they go to bed are thwarting the metabolic regulation of their bodies. What fool would say that?
It is not immoral to fast, or eat lesser. Or go a day without eating. Christ went 40 days without eating. But it would be immoral to stick your finger down your throat during dinner and purge so that you can eat more without consequence. Or to drink ipecac afterwards, or take laxatives. It thwarts God’s design for food and drink.
But nowhere are we commanded to eat at every opportunity and gather every calorie possible just because food is God’s way of sustaining life. And those who cannot take weighing 300 lbs are somehow wrong in your book.
The reason the Church says NFP is licit is that even if the couple did not INTEND the act to be fertile, by their actions they have left open the possibility that conception might occur. They have not done anything outright in violation of God’s natural plan to inhibit it. So sometimes conception occurs with NFP even despite the couple’s intent. Even though by practicing NFP they are saying they are open to God’s plan. That part of NFP instruction often gets lost by the wayside.
The couple is saying “We recognize our mutual fertility pattern. We will exercise self restraint and continence in keeping with that to space children. But we recognize that ultimately God is the Author of Life and His plan may be otherwise for us. And we are open to that.”
That is the basic difference between NFP and ABC. You are ignoring that completely.