This statement emanates from the Calvanistic heresies. The error comes from a warped perspective on the understanding of original sin. It is true that we are legally declared justified by God’s grace. However, the process of cleansing us from sins (sanctification) is not always completed at the time of our death. He does not impute our sins to us, becuase of the perfect sacrifice of His son. However, this does not make the effects of the sins vanish. Cleansing and healing is still necessary. This is why only the saved will be in purgatory.
Jesus was clear that there are degrees of sin. This is also found in Jewish teaching,and salvation comes from the Jews.
I have learned a great deal about this since I came to CAF, and have had occasion to pose these questions. The basic problem is that people are separated from the Apostolic Tradition. They attempt to reconstruct what the Apostles believed and taught by extrapolating it from scripture. This causes all kinds of errors. One of these errors is that Jesus’ sacrifice paid for all the sins that are past, present, and future. Since He paid for them all, there is no longer any need to concern oneself with them. Paying attention to sin is considered being “stuck with a sin issue”. On the contrary, it is thought that repentance means we turn from unbelief to belief. I even had one Reformed Evangelical tell me that the Bible does not say we need to repent of our sins! This is a very gross departure from the Apostolic Faith. But, one must keep in mind that modern Evangelicals never received the Apostolic faith. They are born of 500 years of cumulating heresies and don’t even know that there is something different.
The other major problem we encounter when discussing “saved” with evangelicals is that many of them have fallen into the heresy of OSAS (once saved, always saved). They were taught that praying the “sinners prayer” saves them, and that nothing they can ever do will cause them to lose it. This perspective is not consistent with the Apostolic Teaching.
I cannot see what it is about this statement that is not consistent with Catholic teaching, except that we must choose to participate in the saving work of Christ, in order for us to benefit from it.
Yes, what we do matters, and it matters because it is a reflection of our faith (or lack of it) and grace working in us. We know the tree by it’s fruits, and a bad tree bears bad fruit. As saved person does not persist in a life of sin because it is inconsistent with one’s identity.