To “the Church” section I would suggest adding Mt 18:15-18.
It is significant because of it’s instruction to tel it to the church and to listen to the church on pain of separation.
It is interesting to note that “church” (Ekklesia) is only used twice in the Gospels. Both times in Matthew and both times associated with the authority to bind and loose “whatever”.
Some will say that this applies only to “personal sin” - or problems between church members to which I ask - “Is teaching a false Gospel a sin?” The obvious answer is yes it is…so this passage applies since it deals with “sin”.
In addition - these instructions can be seen acted out in Acts 15. These two things, in tandem, are very powerful witness to the authority of the Church.
Another “church” verse is Eph 3:10 - that it is through “the church” that God’s wisdom is shown to the world. This is a good verse to use in tandem with 1 Tim 3:15.
I had not heard it much before either. I think the reason perhaps is because so often conversations with protestants go directly to the authority of “the Pope” - infallible and universal. When that happens the conversation goes - pretty much - immediately to Mt 16.
Depending on who I am in conversation with, I will tend to take a different approach - showing the validity of the Church’s universal authority and that the Pope - far from being (what many seem to think) and “all powerful autocrat” - actually works within a very profound councilior structure - Just as the Bible describes.
This approach seeks to show that the NT is consistent in it’s call for a profound, visible, and universal unity among the faithful - something that the protestant model really does not allow for.