{{___ \\There is no justification for sinful men except by faith.//}}
The teaching is usually expressed by the phrase "justification by faith", and Warfield uses the familiar expression. More precise: "Saved by grace (unmerited favor) through faith."
The foundation of individual salvation is the unmerited favor of God.
The instrument of individual salvation is God-given, born-of-God, freely available, miraculous faith.
* God given: Ephesians 2:8-10 KJV For by grace are ye saved through faith; and that not of yourselves: it is the gift of God: (9) Not of works, lest any man should boast. (10) For we are his workmanship, created in Christ Jesus unto good works, which God hath before ordained that we should walk in them.
* Born-of-God: 1 John 5:4-5 KJV For whatsoever is born of God overcometh the world: and this is the victory that overcometh the world, even our faith. (5) Who is he that overcometh the world, but he that believeth that Jesus is the Son of God?
* Freely available: Revelation 22:17 KJV And the Spirit and the bride say, Come. And let him that heareth say, Come. And let him that is athirst come. And whosoever will, let him take the water of life freely.
* Miraculous: Romans 8:16 KJV The Spirit itself beareth witness with our spirit, that we are the children of God:
{{___ Whose faith justifies us, the faith of Jesus Christ or our faith?
{{___ Gal.2:16 Knowing that a man is not justified by the works of the law, but by the faith of Jesus Christ, even we have believed in Jesus Christ, that we might be justified by the faith of Christ, and not by the works of the law: for by the works of the law shall no flesh be justified.}}
There is no preposition "of:" in the Greek text. The genitive case of the noun makes the insertion of a preposition necessary for good English. "Of" is often inserted in literal translations as the best general-purpose preposition available. The sense from context in this passage indicates that "in" should be used here. Even some of the most literal translations use "in".
Galatians 2:16 ASV yet knowing that a man is not justified by the works of the law but through faith in Jesus Christ, even we believed on Christ Jesus, that we might be justified by faith in Christ, and not by the works of the law: because by the works of the law shall no flesh be justified.
Galatians 2:16 LITV knowing that a man is not justified by works of Law, but that it is through faith in Jesus Christ (we also believed into Christ Jesus, that we may be justified by faith in Christ and not by works of Law, because all flesh will not be justified by works of Law). Psa. 123:2
Note also the prepositions after "believed" in these translations: "on" / "into" rather than "in Christ Jesus". The Greek preposition used here indicates "the point reached or entered" according to Strong.