It appears that this is a problem of understandings of the faith. I would think your husband is of the mindset that all Christians are part of the “one church of God” just because they believe in Christ. Not necessarily of the same beliefs and traditions. So one acknowledges any “pastor” of any church as having the certain guidance given by the Holy Spirit.
I would say that you should learn about apologetics and have some chats with him in the context of line of thoughts (to seek truth), with the knowledge that things will take some time. Because the way someone changes their belief system is kind of “weird” (meaning that sometimes some things that you didn’t think could do a difference are the things that do the difference. The mindset is that we are not going to make someone change, maybe we will plant the seeds but the Holy Spirit is the one that acts). I would say to see things from John Martignoni in the Bible Christian Society. I like the way he explains things as he explains why we believe on certain things by explaining the way to interpret the Bible, as the Catholic Church would state. But he does it in a “sequential” line of thought, meaning that one thing leads to another.
biblechristiansociety.com/home
One good thing though, is that he has accepted that catholics are Christians, some denominations don’t think like that, they think the Pope is the antichrist.
Now, the problem that I should state to him, is that in the catholic faith, we need a certain purity, cleanliness, to take the Eucharist. This is the point he needs to analyze more and read more about. It is not enough to believe in Christ, but it is important that our faith takes us to act solemnly towards divinity. And part of it includes the sacraments, particularly the sacrament of confession. You are acting your faith in good conscience when your understandings makes you act with the reverence needed. But just because you think something is correct doesn’t mean you are acting in a correct way. That’s why we need to study and analyze things. The fear of God can come, but His knowledge is always a journey, a journey that will be decided by ones sincerity in truly knowing divinity, God. That’s why it is a problem when we are not focus or are too open to every interpretation in things of faith, because we can believe many things that are not of Him. One of these things comes to the problem of infallibility, or who is infallible in the things of faith.
Here is a good explanation on good and evil to some sense (though “Love and responsibility” talks about the correct relationship of man and woman, but it explains the conscience part in a nice way):
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In discussing the good and evil of human acts, St Thomas applies the Dionysian formula, i.e., “Evil results from any single defect, but good from the complete cause.” This means that a morally good act requires the goodness of all its sources together, namely of the object, of the end, and of the circumstances, including the consequences.
Action in conformity with conscience is thus always morally good, but it is not at the same time always morally right. However, conscience, even if being erroneous, always obliges to action in conformity with it, because the one who errs does not know by definition about his error. The possibility of making a mistake in such an essential issue inclines one toward particular care for the accuracy of one’s moral recognitions. The only way you guarantee this accuracy is to strive for ever deeper knowledge of who man is in his objective structure. To present precisely this structure of man, a man and a woman, within the totality of their vocation to reciprocal love, is the main task of this book. "
”} Footnote From Love and Responsibility by Karol Wojtyla
I remembered this scripture when reading this thread:
“25 He leaned back against Jesus’ chest and said to him, “Master, who is it?” 26 Jesus answered, “It is the one to whom I hand the morsel 9 after I have dipped it.” So he dipped the morsel and (took it and) handed it to Judas, son of Simon the Iscariot. 27 After he took the morsel, Satan entered him. So Jesus said to him, “What you are going to do, do quickly.”” John 13, 25-27
9 [26] Morsel: probably the bitter herb dipped in salt water.