Some quotes on Catholic justification:
“Broadly speaking, Catholic and Orthodox Christians distinguish between initial justification —which in their view occurs at baptism— and final justification, accomplished after a lifetime of striving to do God’s will.”
source:
en.wikipedia.org/wiki/Justification_%28theology%29
“Justification is a translation from that state in which man is born a child of the first Adam, to the state of grace and of the adoption of the sons of God through the second Adam, Jesus Christ, our Saviour”
vivacatholic.wordpress.com/223-2/
“Justification is conferred in Baptism [33]. Baptism is necessary for salvation of those who hear the Gospel (Mark 16:16. 1 Peter 3:21) and have chance to take it [34].
Through Baptism we are cleansed from original sin, other sins (Acts 2:38, 22:16) and all punishment for sins [35] – we are therefore born anew (Romans 6:3-4) as sons of God [36], become members of His Church [37] and receive the grace of justification [38], i.e. Sanctifying Grace. Sanctifying Grace is lost through committing mortal sin [39] – we regain it back when moved by grace we repent and are forgiven (by God) through Sacrament of Penance [40].”
vivacatholic.wordpress.com/223-2/
"Because Justification is an on-going process, it starts when God, without any merit from us [7], takes the initiative to move us to believe in Christ (John 6:44). It includes Sanctification, remission of sin and renewal of inner man [8].
Sanctification is separated from Justification but there is no Justification without Sanctification [9].
“Through (on-going process) Justification the righteousness of God through Christ is infused by the Holy Spirit in us or through Justification we are made righteous [10], as stated in Romans 5:19.”
vivacatholic.wordpress.com/223-2/
“Our righteousness does come from God (not from ourselves) and with our co-operation it becomes inherent part of us – we become and are righteous [8].”
vivacatholic.wordpress.com/223-2/
"Adults are justified FOR THE FIRST TIME either by personal faith, sorrow for sin and baptism, or by the perfect love of God, which is at least an implicit baptism of desire.
(Modern Catholic Dictionary, Garden City, NY: Doubleday & Co., 1980, “Justification, Theology
of,” 302, emphasis added)"
socrates58.blogspot.com/2004/05/catholic-initial-justification.html
“Justification…It can refer to a divine action as well as a spiritual process. As an action, justification is the moment when God makes righteous the one who believes in Christ and establishes him or her in a covenant relationship with himself. As a process, justification is the growth in righteousness and grace that takes place in the believer who embraces the demands of the gospel and yields himself or herself to the leading of the Spirit.”
(Catholic Bible Dictionary, Scott Hahn)
“Moreover, justification by faith is effected in the liturgical context of baptism. Paul indicates as much when he tells the Corinthians: “But you were washed, you were sanctified, you were justified in the name of the lord Jesus Christ and in the Spirit of our God” (1 Cor 6:11). Baptism, being the sacrament of faith, is therefore the sacrament of justification (Titus 3:5-7).”
(Catholic Bible Dictionary, Scott Hahn)
“Likewise, because the grace that justifies is a “free gift of righteousness” (Rom 5:17), Paul insists that man cannot be the author of his own justificatino, either by the performance of good works in general (titus 3:5) or by the observance of specific works of the Law (Rom 3:28). Were this possible, man would have an occasion for boasting in himself (Rom 4:2; Eph 2:8-9) rather than in the Lord (1 Cor 1:30-31).”
(Catholic Bible Dictionary, Scott Hahn)