Hmmm… I think I would actually agree with him, at least in part. Though it is certainly not arrogant to claim you are correct in your teachings (so the fullness of truth thing is okay), much of the time, members of Catholic Church proclaim all other doctrines to not be “truly Christian,” a fact that at once confuses and irritates me. (Though I am also confused by those who claim Catholics are not Christians; the arguments on both sides have troubled me greatly.)
I hold that finding a living church that meets spiritual needs and is alive is infinitely better than a dead church that has correct doctrine on all matters (and by this I refer to doctrine that is NOT needed for salvation). In the book of Revelation, arguably the greatest criticism levied against the churches is that of being lukewarm. It says quite clearly: “So, because you are lukewarm—neither hot nor cold—I am about to spit you out of my mouth.” *Nothing *good was said of this church. No criticism of doctrine was made, but neither were any praises offered for having it right. Thus, I hold that your husband is correct, in part. Suppose I were to seek out a church and find two churches – one completely accurate in all doctrine, but spiritually dead and lifeless, and the other wrong, to my understanding, in a doctrine that is not essential for salvation, but nevertheless spiritually alive and deeply in love with God. I would chose the second, despite my agreement with the first. It is not because I care only for emotionalism and ignore what I judge to be true; it is because only in the second church will I be able to grow and mature as a Christian around faithful believers. The consideration of a living Faith trumps minor doctrinal disagreements, like when we should baptize, how we should organize the church leadership, when communion should take place, whether or not we should circumcise, etc.