Faith of Christ
Romans 3:22 Even the righteousness of God which is by faith of Jesus Christ unto all and upon all them that believe: for there is no difference:
Galatians 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.
Philippians 3:9 And be found in him, not having mine own righteousness, which is of the law, but that which is through the faith of Christ, the righteousness which is of God by faith
Ephesians 2:8 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.
The faith of Christ, (KJV - John 12:44-50; Galatians 2:16; Philippians 3:9), is where we find faith in Christ. The newer translations has changed where it says faith of Christ to faith in Christ. There is a difference between faith of Christ and faith in Christ as you can read in those scriptures out of the KJV. The faith of Christ is what He believed in the Father as He never said or did anything above that which God gave Him to speak or to do while He was on earth. Our faith in Christ is the same faith of Christ He had in the Father as we can never go above that of what He taught us and the works He left for us to follow in.
The Son of God is that free gift of God's grace given to all who will believe by faith in Christ and confess Him as Lord and Savior so they will see the kingdom of God, John 3:5-7; Romans 10:9, 10. There is no working towards something that is free as all we have to do is accept the gift. Believe is a verb that means something we consider to be true as we have heard the Gospel and not only heard it, but also believe what is written for our well being.
Faith works come after we are Spiritually born again and indwelled with the Holy Spirit that empowers us to go out into the world and continue in the good works of the Lord, Acts 2:37, 38; James 2:14-20. The good works are taking His Gospel message to the world as we too are His disciples and to love and help those in need as what we do we do unto the glory of the Lord Christ Jesus, Matthew 25:31-40