- Why do Catholics believe we are all sinners?
- Hans-Georg Lundahl
- Converted to Roman Catholic Church, Novus Ordo version, then to Trad.
- Answered just now
- We don’t.
We believe we have all BEEN sinners.
Note the tense used by St Paul “we have all sinned and fallen short of”
There are of course two exceptions, Christ and the Blessed Virgin, who were never sinners in all their lives.
Adam and Eve became sinners, but died as good penants, and their descendants (other than the woman and her seed, see Genesis 3:15) all start out as sinners.
We believe a new born baby is a sinner. We also believe a newly baptised baby is no longer a sinner, and for some years cannot become a sinner again.
When someone is justified, he ceases to be a sinner.
In fact, I have heard the KJV of this verse so often, in DR it is Romans 3:  For all have sinned, and do need the glory of God. But sinned is still in the past tense for "all". It is still not predicated as a present quality of those justified.