Confessing Christ's Righteousness Imputed to Sinners - Justification Received Through Faith Alone.

The righteousness of Christ is reckoned or imputed to sinners, not infused or worked in them, and is received through faith alone for their justification.  Good works done by the believer play no part in his justification. Rather it is Jesus Christ's obedience to the point of death, even death on a cross that is the sole meritorious ground upon which a sinner is accepted by God.

Heidelberg Catechism 60 Although my conscience accuses me that I have grievously sinned against all God's commandments, have never kept any of them, and am still inclined to all evil, yet God, without any merit of my own, out of mere grace, imputes to me the perfect satisfaction, righteousness, and holiness of Christ. He grants these to me as if I had never had nor committed any sin, and as if I myself had accomplished all the obedience which Christ has rendered for me, if only I accept this gift with a believing heart.  

Belgic Confession 22 Jesus Christ, imputing to us all his merits and so many holy works which he has done for us, and in our stead, is our Righteousness.  

Westminster Confession of Faith 11.1 Those whom God effectually calls, He also freely justifies; not by infusing righteousness into them, but by pardoning their sins, and by accounting and accepting their persons as righteous; not for any thing wrought in them, or done by them, but for Christ's sake alone; nor by imputing faith itself, the act of believing, or any other evangelical obedience to them, as their righteousness; but by imputing the obedience and satisfaction of Christ unto them.  

Westminster Larger Catechism 71 Although Christ, by his obedience and death, did make a proper, real, and full satisfaction to God's justice in the behalf of them that are justified; yet inasmuch as God accepts the satisfaction from a surety, which he might have demanded of them, and did provide this surety, his own only Son, imputing his righteousness to them, and requiring nothing of them for their justification but faith, which also is his gift, their justification is to them of free grace.  

Westminster Shorter Catechism 33 Justification is an act of God's free grace, wherein he pardons all our sins, and accepts us as righteous in his sight, only for the righteousness of Christ imputed to us, and received by faith alone.

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Romans 4:4 Now to the one who works, his wages are not counted as a gift but as his due. And to the one who does not work but believes in him who justifies the ungodly, his faith is counted as righteousness, just as David also speaks of the blessing of the one to whom God counts righteousness apart from works:

“Blessed are those whose lawless deeds are forgiven, and whose sins are covered;blessed is the man against whom the Lord will not count his sin.”

2 Corinthians 5:21 For our sake he made him to be sin who knew no sin, so that in him we might become the righteousness of God. 

1 Peter 2:24 He himself bore our sins in his body on the tree, that having died to sins we might live to righteousness. By his wounds you have been healed. 

Philippians 3:9 And be found in him, not having a righteousness of my own that comes from the law, but that which comes through faith in Christ, the righteousness from God that depends on faith— 

Romans 6:1-7 What shall we say then? Are we to continue in sin that grace may abound? By no means! How can we who died to sin still live in it? Do you not know that all of us who have been baptized into Christ Jesus were baptized into his death? We were buried therefore with him by baptism into death, in order that, just as Christ was raised from the dead by the glory of the Father, we too might walk in newness of life. For if we have become united with him in the likeness of his death, we shall be also in the likeness of his resurrection. We know that our old man was crucified with him in order that the body of sin might be done away, so that we would no longer be in bondage to sin. For one who has died has been justified from sin. But if we died with Christ, we believe that we shall also live with him; knowing that Christ being raised from the dead dies no more; death no more hath dominion over him. For the death that he died, he died unto sin once: but the life that he liveth, he liveth unto God. Even so reckon ye also yourselves to be dead unto sin, but alive unto God in Christ Jesus. [see Robert Haldane's Romans Commentary]

Isaiah 53:5 But he was wounded for our transgressions; he was crushed for our iniquities; upon him was the chastisement that brought us peace, and with his stripes we are healed. 

1 John 2:2 He is the propitiation for our sins, and not for ours only but also for the sins of the whole world. 

Galatians 3:13 Christ redeemed us from the curse of the law by becoming a curse for us—for it is written, “Cursed is everyone who is hanged on a tree”— 

1 Corinthians 1:30 And because of him you are in Christ Jesus, who became to us wisdom from God, righteousness and sanctification and redemption, 

Romans 8:1-4 There is therefore now no condemnation for those who are in Christ Jesus. For the law of the Spirit of life has set you free in Christ Jesus from the law of sin and death. For God has done what the law, weakened by the flesh, could not do. By sending his own Son in the likeness of sinful flesh and for sin, he condemned sin in the flesh, in order that the righteous requirement of the law might be fulfilled in us, who walk not according to the flesh but according to the Spirit. 

Romans 3:20-26 For by works of the law no human being[c] will be justified in his sight, since through the law comes knowledge of sin. But now the righteousness of God has been manifested apart from the 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: for all have sinned and fall short of the glory of God, and are justified by his grace as a gift, through the redemption that is in Christ Jesus, whom God put forward as a propitiation 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 show his righteousness at the present time, so that he might be just and the justifier of the one who has faith in Jesus.

Psalm 32:2 Blessed is the man against whom the Lord counts no iniquity, and in whose spirit there is no deceit. 

1 Peter 3:18 For Christ also suffered once for sins, the righteous for the unrighteous, that he might bring us to God, being put to death in the flesh but made alive in the spirit, 

Hebrews 10:14 For by a single offering he has perfected for all time those who are being sanctified. 

Hebrews 9:28 So Christ, having been offered once to bear the sins of many, will appear a second time, not to deal with sin but to save those who are eagerly waiting for him. 

Romans 7:1-4 Or do you not know, brothers—for I am speaking to those who know the law—that the law is binding on a person only as long as he lives? For a married woman is bound by law to her husband while he lives, but if her husband dies she is released from the law of marriage. Accordingly, she will be called an adulteress if she lives with another man while her husband is alive. But if her husband dies, she is free from that law, and if she marries another man she is not an adulteress. Likewise, my brothers, you also have died to the law through the body of Christ, so that you may belong to another, to him who has been raised from the dead, in order that we may bear fruit for God.