The process of Justification begins at conversion

Some people, even knowledgable Catholics, claim that the process of justification begins at Baptism. I see it differently and I believe I can prove it according to Catholic Teaching.

According to my understanding of Trent, justification begins at conversion, when God calls the man to turn to Him:
CHAPTER V
THE NECESSITY OF PREPARATION FOR JUSTIFICATION IN ADULTS, AND WHENCE IT PROCEEDS

It is furthermore declared that in adults the beginning of that justification must proceed from the predisposing grace of God through Jesus Christ, that is, from His vocation, whereby, without any merits on their part, they are called; ….


The CCC says the same:
1987 The grace of the Holy Spirit has the power to justify us, that is, to cleanse us from our sins and to communicate to us "the righteousness of God through faith in Jesus Christ" and through Baptism:34....

Notice how two ways are here identified, by the righteousness of God through faith AND through Baptism.

1989 The first work of the grace of the Holy Spirit is conversion, effecting justification in accordance with Jesus' proclamation at the beginning of the Gospel: "Repent, for the kingdom of heaven is at hand." Moved by grace, man turns toward God and away from sin, thus accepting forgiveness and righteousness from on high. "Justification is not only the remission of sins, but also the sanctification and renewal of the interior man.

Notice again, two modes identified, the remission of sins and also the sanctification and renewal of the inner man (Baptism and the Sacraments).

The first work is conversion which effects justification.

This is clearly seen in the RCIA process. People who convert turn to God and begin to live according to the Commandments. Despising their sins and asking God for forgiveness.

Then they ask for Baptism, they are Baptized, born again children of God.

Therefore, I believe the Church teaches that the process of justification begins prior to Baptism, at the first instance of conversion.

Sincerely,

De Maria