The "old law" required faith as well.
No it did not.
Galatians 3:12 And the law is not of faith:
A changed law is a a new law.
You can't call it an old law if you changed it. You have to call it a new law.
Moses said eye for eye and tooth for tooth, but Jesus says no more eye for eye and tooth for tooth.
Jesus says
8 “You have heard that it was said, ‘Eye for eye, and tooth for tooth.’
39 But I tell you, do not resist an evil person. If anyone slaps you on the right cheek, turn to them the other cheek also.
40 And if anyone wants to sue you and take your shirt, hand over your coat as well.
41 If anyone forces you to go one mile, go with them two miles.
42 Give to the one who asks you, and do not turn away from the one who wants to borrow from you.
So you don't call that a new law?
The body of Christ has no priesthood... never did. Israel had a priesthood.
Jesus is the High Priest.
Hebrews 4:14 Seeing then that we have a great high priest, that is passed into the heavens, Jesus the Son of God, let us hold fast
our profession.
Why do you try to get your doctrine from a book written to the HEBREWS? (never mind, I already know).
So you are going to act that way about a book in the Bible?
By the way, Hebrews says Jesus wouldn't have been a priest if he lived on earth.
Hebrews 8:4 If he were on earth, he would not be a priest, for there are already priests who offer the gifts prescribed by the law.
Hebrews 2:17
For this reason He had to be made like His brothers in every way, so that He might become a merciful and faithful high priest in service to God, in order to make atonement for the sins of the people.
Hebrews 3:1
Therefore, holy brothers, who share in the heavenly calling, set your focus on Jesus, the apostle and high priest whom we confess.
Hebrews 3:6
But Christ is faithful as the Son over God's house. And we are His house, if we hold firmly to our confidence and the hope of which we boast.
The body of Christ was never under "the old law".
Jesus is the High Priest of God's kingdom, of heaven.
Look at what Hebrews 10:16 is QUOTING:
THEIR SIN refers to the HOUSE OF ISRAEL (but you will never understand it).
Of course, God is going to say that to them they were the ones who read and obeyed God's words and were God's perople.
James knew not what Paul received from God.
Yikes, nonsense; the old law given to Moses isn't the law of liberty.
James 2:12 So speak ye, and so do, as they that shall be judged by the law of liberty.
James 1:25 But whoso looketh into the perfect law of liberty, and continueth
therein, he being not a forgetful hearer, but a doer of the work, this man shall be blessed in his deed.
James was writing to the... TWELVE TRIBES OF ISRAEL. James 1:1
That doesn't make it a different gospel from Paul; just makes it different backgrounds of the people listening. We all get to read it now to help guide us to eternal life.