As Paul writes about both Jews and Gentiles needing Jesus to be saved, he tells us in Romans 3.30b that,
God will justify the circumcised BY faith and the uncircumcised THROUGH faith.
Those upper-case letters are mine, you probably thought Paul did that. But no...
I am wondering what the difference might be.
Jews are saved by faith.
Marcos is saved through faith.
Hmmm.