All quotes are from the Catechism of the Catholic Church and Documented below. See Button link at the bottom for a searchable link to the Catechism
I see my justification as a free gift of God
The catechism of the Catholic Church cites Romans Rom 3:21-26,
Para 1992 "But now the righteousness of God has been manifested apart from law, although the law and the prophets bear witness to it, the righteousness of God through faith in Jesus Christ for all who believe. For there is no distinction: since all have sinned and fall short of the glory of God, they are justified by his grace as a gift, through the redemption which is in Christ Jesus, whom God put forward as an expiation by his blood, to be received by faith. This was to show God's righteousness, because in his divine forbearance he had passed over former sins; it was to prove at the present time that he himself is righteous and that he justifies him who has faith in Jesus.41"
given to me by the grace which was merited by the Cross, the death and Resurrection of Christ.
1992 Justification has been merited for us by the Passion of Christ who offered himself on the cross as a living victim, holy and pleasing to God, and whose blood has become the instrument of atonement…
That I have been predestined, called, justified and will be glorified as one of the elect
by God's Will through Faith, apart from works.
2012 "We know that in everything God works for good with those who love him . . . For those whom he foreknew he also predestined to be conformed to the image of his Son, in order that he might be the first-born among many brethren. And those whom he predestined he also called; and those whom he called he also justified; and those whom he justified he also glorified."64
And the Church sites: Rom 8:28-30
It is Through Faith that God credits righteousness unto me apart from anything I have done
2543 "But now the righteousness of God has been manifested apart from law, although the law and the prophets bear witness to it, the righteousness of God through faith in Jesus Christ for all who believe."333 Henceforth, Christ's faithful "have crucified the flesh with its passions and desires"; they are led by the Spirit and follow the desires of the Spirit.334
The CCC Citing 333 Rom 3:21-22.
146 Abraham thus fulfills the definition of faith in Hebrews 11:1: "Faith is the assurance of things hoped for, the conviction of things not seen":7 "Abraham believed God, and it was reckoned to him as righteousness."8 Because he was "strong in his faith", Abraham became the "father of all who believe".9
The CCC citing
Rom 4:11,18; 4:20;
Gen 15:5
so that I may know and experience the forgiveness of sins
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.
through the redemption of his blood according to grace, not according to man, so that no one may boast.
517 Christ's whole life is a mystery of redemption. Redemption comes to us above all through the blood of his cross, but this mystery is at work throughout Christ's entire life:
2010 Since the initiative belongs to God in the order of grace, no one can merit the initial grace of forgiveness and justification, at the beginning of conversion.
2011 The charity of Christ is the source in us of all our merits before God. Grace, by uniting us to Christ in active love, ensures the supernatural quality of our acts and consequently their merit before God and before men. The saints have always had a lively awareness that their merits were pure grace.
I believe my justification has been merited by Christ alone, by his passion,
613 Christ's death is both the Paschal sacrifice that accomplishes the definitive redemption of men, through "the Lamb of God, who takes away the sin of the world", and the sacrifice of the New Covenant, which restores man to communion with God by reconciling him to God through the "blood of the covenant, which was poured out for many for the forgiveness of sins"
and that just as disobedience came from one man, so too through the obedience of Christ I am made righteous.
615 "For as by one man's disobedience many were made sinners, so by one man's obedience many will be made righteous." By his obedience unto death, Jesus accomplished the substitution of the suffering Servant, who "makes himself an offering for sin", when "he bore the sin of many", and who "shall make many to be accounted righteous", for "he shall bear their iniquities". Jesus atoned for our faults and made satisfaction for our sins to the Father.
I am a new creation in Christ,
"Therefore if any one is in Christ, he is a new creation; the old has passed away, behold, the new has come. All this is from God, who through Christ reconciled us to himself."
2 Cor 5:17-18.
But I need God's grace to assist me to do the work he has planned for me. God Brings to completion in me, the good which he started Phil 1:6
6 For I am confident of this very thing, that He who began a good work in you will perfect it until the day of Christ Jesus.
269 The Holy Scriptures repeatedly confess the universal power of God. He is called the "Mighty One of Jacob", the "LORD of hosts", the "strong and mighty" one. If God is almighty "in heaven and on earth", it is because he made them. Nothing is impossible with God, who disposes his works according to his will. He is the Lord of the universe, whose order he established and which remains wholly subject to him and at his disposal. He is master of history, governing hearts and events in keeping with his will: "It is always in your power to show great strength, and who can withstand the strength of your arm?
Dei Verbum 5
The obedience of faith" (Rom. 13:26; see 1:5; 2 Cor 10:5-6) "is to be given to God who reveals, an obedience by which man commits his whole self freely to God, offering the full submission of intellect and will to God who reveals," (4) and freely assenting to the truth revealed by Him. To make this act of faith, the grace of God and the interior help of the Holy Spirit must precede and assist, moving the heart and turning it to God, opening the eyes of the mind and giving "joy and ease to everyone in assenting to the truth and believing it." (5) To bring about an ever deeper understanding of revelation the same Holy Spirit constantly brings faith to completion by His gifts.
Sanctification is whereby God allows me to be associated with good works
2008 The merit of man before God in the Christian life arises from the fact that God has freely chosen to associate man with the work of his grace. The fatherly action of God is first on his own initiative, and then follows man's free acting through his collaboration, so that the merit of good works is to be attributed in the first place to the grace of God, then to the faithful. Man's merit, moreover, itself is due to God, for his good actions proceed in Christ, from the predispositions and assistance given by the Holy Spirit.
and as a result of this gratuitous gift my only response is to do what he commands, to be holy as he is holy to be perfect as he is perfect
842 This "as" is not unique in Jesus' teaching: "You, therefore, must be perfect, as your heavenly Father is perfect"; "Be merciful, even as your Father is merciful"; "A new commandment I give to you, that you love one another, even as I have loved you, that you also love one another."139 It is impossible to keep the Lord's commandment by imitating the divine model from outside; there has to be a vital participation, coming from the depths of the heart, in the holiness and the mercy and the love of our God. Only the Spirit by whom we live can make "ours" the same mind that was in Christ Jesus.140 Then the unity of forgiveness becomes possible and we find ourselves "forgiving one another, as God in Christ forgave" us.141
2013 "All Christians in any state or walk of life are called to the fullness of Christian life and to the perfection of charity." All are called to holiness: "Be perfect, as your heavenly Father is perfect."
And therefore to submit myself to him as a slave to righteousness, resulting in sanctification.
602 Consequently, St. Peter can formulate the apostolic faith in the divine plan of salvation in this way: "You were ransomed from the futile ways inherited from your fathers... with the precious blood of Christ, like that of a lamb without blemish or spot. He was destined before the foundation of the world but was made manifest at the end of the times for your sake." Man's sins, following on original sin, are punishable by death. By sending his own Son in the form of a slave, in the form of a fallen humanity, on account of sin, God "made him to be sin who knew no sin, so that in him we might become the righteousness of God."
1995 The Holy Spirit is the master of the interior life. By giving birth to the "inner man,"44justification entails the sanctification of his whole being:
Just as you once yielded your members to impurity and to greater and greater iniquity, so now yield your members to righteousness for sanctification. . . . But now that you have been set free from sin and have become slaves of God, the return you get is sanctification and its end, eternal life.45
The catechism Cites Rom 6:19,22.
I am justified by Christ alone, who alone became my Sanctification and Redemption - Sola Christo!