Reading the Bible recently, I came across 1 Cor. 7:19, which reads:
For neither circumcision counts for anything nor uncircumcision, but keeping the commandments of God.
It struck me as interesting, since we read also in Galatians 5:6:
For in Christ Jesus neither circumcision nor uncircumcision is of any avail, but faith working through love.
As a Protestant, I would typically scan right over such verses without much thought, but it strikes me as odd that, if sola fide were true, St. Paul would not here very clearly say: “Neither circumcision nor uncircumcision matter, but only faith alone.”
Instead, again rather oddly, he emphasizes “the commandments” and “faith working through love.” Perhaps we could even draw a connection that keeping the commandments and faith working through love are intimately related?
I think the response to this, from a Protestant, would be something like: Paul is not here talking about justification but about sanctification or the works done by the already-justified Christian.
And that may be true, but with the previous verses in Galatians specifically talking about justification, it seems either justification has an ongoing aspect (as Catholics claim it does), or the Bible is easy to misinterpret in these passages.