I believe the difficulty your husband is having is based in the fact that when the Son of God came among us he did not use his divine powers but rather worked his miracles through the Holy Spirit to show us that we too can do works for God even though we are not divine as he was. He called himself the Son of Man because that was the title of the long waited Messiah, so he was identifying himself as the Messiah by using that title.
Reading the Bible is a fine thing to do, but if we don’t understand what the terms in it mean we can’t understand what is being said or what the passage means. The reason the Church has the right to determine what the Bible means is that, essentially, the Church is the author of the Bible in the prophets of the OT who looked forward to the Messiah and in the fact that Jesus gave the Church, in the Apostles and their successors the authority to decide matters of faith and morals, and it was they who wrote the NT.
It’s just about who knows what the Bible says and why, not about the Church imposing its will on anyone. Ask him if he sent you a letter who would be able to explain some unclear word or passage to you, him or a stranger off the street? He would, of course. It’s the same for the Church. The Bible is its books, so it has the right to tell us what it means.