[Campion]

In my 35+ years as a Protestant, I’ve never heard anyone say, “Luther/Calvin/Spurgeon said it; I believe it!”

I've never heard a Catholic say "Aquinas said it, I believe it," either. What's your point?

We quote COMMENTATORS who provide ARGUMENTS, not AUTHORITIES.

A distinction without a difference.

Luther’s writings (and Augustine’s) are interesting. God’s writings are revealed truth. The latter judges the former.

Obviously. Why do you think we believe any differently?

[Mr Rogers]

“Why do you think we believe any differently? “

Because I’ve read papal proclamations. The ones I read cited various saints for authority, rather than explaining how their arguments had validity.

An argument has no authority because it comes from Luther or Augustine. For authority, it need to comply with scripture. That is the difference between citing authorities and reading commentary.