I see where you are heading and The Genitive Case is not the issue.
[ Continued from my previous post to you ]
The Entrance Gate and Foundation:
Paul is fighting against what I call “Circumcision Salvationism,” which is the false belief that a person first had to be circumcised and brought under the Old Covenant law system in order to be initially saved. Paul hints at this when he says in Galatians 2:3, “But neither Titus, who was with me, being a Greek, was compelled to be circumcised:” (For the false “Circumcision Salvation” belief being promoted by the Jews upon Christians, see Acts 15:1, Acts 15:5, and Acts 15:24 in the KJV. Note: You must read these passages in the KJV because some of these words are neutered like a cat in the modern versions.)
Anyway, the immediate concern in Galatians 2:16 is therefore the entrance gate and foundation of our salvation. We do not enter through circumcision, works of the law, or our own righteousness. Our initial salvation begins solely with the grace of God through Jesus Christ.
Under the faithfulness of Christ interpretation, that foundation rests in Christ’s faithfulness and what He accomplished for us. We place our faith in Him and rest in His grace. From there, we continue looking to Christ and depending upon His inner working in our lives and His continued faithfulness toward us.
That does not mean obedience, righteousness, and holiness become optional afterward. They are necessary under the New Covenant. We are to follow Christ and obey His commands and teachings. We cannot justify sin under God’s grace and think that we will be okay with the Lord. If we sin, the biblical response is to confess and forsake it and seek God’s mercy.
Proverbs 28:13 says:
“He that covereth his sins shall not prosper: but whoso confesseth and forsaketh them shall have mercy.”
The larger question of works of faith in the ongoing Christian life is not the main subject here. The point is that our entrance and foundation are not circumcision or works of the Mosaic law, but Jesus Christ, His grace, His faithfulness, and our faith in Him.
Other KJV Passages Concerning Christ’s Faithfulness
This interpretation also fits other passages in the KJV that directly describe Christ’s faithfulness and obedience.
Hebrews 3:1-2 says:
“Wherefore, holy brethren, partakers of the heavenly calling, consider the Apostle and High Priest of our profession, Christ Jesus; Who was faithful to him that appointed him, as also Moses was faithful in all his house.”
Romans 5:18-19 is perhaps even stronger because it connects Christ’s righteousness and obedience directly with justification:
“Therefore as by the offence of one judgment came upon all men to condemnation; even so by the righteousness of one the free gift came upon all men unto justification of life. For as by one man's disobedience many were made sinners, so by the obedience of one shall many be made righteous.”
There is also a direct lexical example in the KJV itself. Titus 2:10 translates πίστις as “fidelity”:
“Not purloining, but shewing all good fidelity; that they may adorn the doctrine of God our Saviour in all things.”
The Greek there is πίστιν, the accusative singular of πίστις. Galatians 2:16 has πίστεως, the genitive singular of the same noun. They are simply different grammatical forms of the same Greek word. Thus the KJV itself gives an example where πίστις carries the sense of fidelity, or faithfulness.
The Middle English Dictionary: “Faith” Could Mean “Faithfulness”
The historical English evidence is also significant. The Middle English Dictionary, under feith, gives in sense 5(a):
“Faithfulness to a trust or promise; loyalty to a person; also, honesty, truthfulness.”
In other words, the English noun faith itself historically could carry the meaning faithfulness. The two concepts were not always separated into the distinct English forms faith and faithfulness as sharply as modern readers may assume.
Middle English Dictionary, feith, n.:
https://quod.lib.umich.edu/m/middle-english-dictionary/dictionary/MED15481
Earlier Lexical Support
Strong’s entry for πίστις also includes “fidelity.”
I generally do not regard modern lexicons as reliable authorities for establishing the meaning of a biblical Greek word. I only take notice of them when they point back to an older source that predates, or stands outside, the influence of German Rationalism.
In this case, Thayer is relevant only because, under πίστις, where he gives the sense “fidelity, faithfulness,” he cites the earlier work of Willem Koolhaas on πίστις, πιστός, and πιστεύειν. Thayer places the Koolhaas citation directly in the section where πίστις is being treated as “fidelity, faithfulness” and as the character of one who can be relied upon.
Willem Koolhaas (1709-1773) was an eighteenth-century Dutch Reformed minister and linguistic scholar, not a product of the later German Rationalist school. His 1733 dissertation on πίστις, πιστός, and πιστεύειν predates the major development of German theological Rationalism.
Older Greek lexical material likewise shows the close relationship between the πιστ- word family and the ideas of fidelity, constancy, trustworthiness, and faithfulness.
Even Modern Critical Text Scholars Recognize the Possibility
After hearing about Tsalampouni’s interpretation, I also discovered that scholars within the modern Critical Text and modern-translation world recognize “the faithfulness of Christ” as a legitimate interpretation.
Daniel Wallace discusses πίστις Χριστοῦ in terms of the possible meanings “faith in Christ” and “the faithfulness of Christ.” Bill Mounce likewise discusses the subjective-genitive versus objective-genitive question and acknowledges “the faithfulness of Jesus” as a possible interpretation.
You told me that the genitive issue is not what you are objecting to in Galatians 2:16. Nevertheless, I decided to investigate that grammatical question more deeply because I know that “the faith of Jesus Christ” has been criticized by some in the Critical Text and modern-translation camp.
I am approaching this from the position that the Textus Receptus is correct and that the KJV accurately translates it as “the faith of Jesus Christ.” My interest in the genitive construction is therefore not about questioning or correcting the text, but about understanding more deeply what the wording already given in the text means.
What especially interested me was discovering that the subjective-genitive construction has been understood in terms of the faithfulness of Christ. Combined with the fact that πίστις itself can carry the sense of fidelity or faithfulness, this gives an important explanation of how “the faith of Jesus Christ” can refer to the faithfulness of Jesus Christ.
What is significant to me is that I did not arrive at the faithfulness of Christ interpretation through Wallace, Mounce, or modern Critical Text scholarship. I first heard about it through Tsalampouni, and only afterward discovered that this same grammatical and lexical interpretation is recognized elsewhere.
Tsalampouni’s Paper:
Aikaterini Tsalampouni’s paper is titled
«Πίστις Χριστοῦ» στις επιστολές του Παύλου, “Pistis Christou in the Letters of Paul,” and is available through her Academia.edu publications page:
https://auth.academia.edu/TsalampouniEkaterini/Exegetical
Note: If you are interested in checking out her paper, just know that her paper is written in Greek, so you may need to translate it. For pinpoint accuracy, you could pay a professional translator. Otherwise, ChatGPT or other AI tools can translate the paper into English for you, although key grammatical statements should still be checked against the original Greek.
....