It's been fascinating these past few years to read here how RCs deny the stain of original sin. It wasn't always that way.
Whether it is Noah or Jacob or Job or John or Paul or you or me or our infant children, all righteousness is the righteousness of Christ.
"For he hath made him to be sin for us, who knew no sin; that we might be made the righteousness of God in him." -- 2 Corinthians 5:21"I have been crucified with Christ. It is no longer I who live, but Christ who lives in me. And the life I now live in the flesh I live by faith in the Son of God, who loved me and gave himself for me." -- Galatians 2:20
Where did I do that?
There is original sin and personal sin. They are very distinct. The former does not condemn to hell, because it is not committed with the cooperation of the will. Both are blotted by the sacrifice of the Cross, which worked in reverse time sequence for the Old Testament righteous and for Mary. The passages "all have sinned" in Romans have a specific context; the one in chapter 3 I believe refers to the general state of man before the Cross and the one in chapter 5 to original sin, and neither needs to be read as allowing no exception. The references to righteousness in the Old Testament -- at least these I had in mind -- refer to absence of personal sin, but not of original sin.
None of that is a new teaching.