James told us not to speak against the brothers by keeping the law (4:11-12). But Paul said that he lived no longer to the law and that he was not in debt to the law (Rom. 7:6; Gal. 2:19).
We should confide not in our self-will but in the Lord (James 4:13-17). This can only be carried out by the new man.
James exhorted us to await the Lord's coming with long-suffering (5:7-9).
James also told us to take the prophets and Job as examples in suffering evil with endurance (5:10-11). But at Job's time there was no new man. Here we can see the mixture in James.
James 5:12 tells us to speak honestly without swearing.
James 5:13-18 speaks of praying according to the example of Elijah.
Finally, James tells us to turn back the brother led astray from the truth (5:19-20). All of the above items are the virtues of Christian perfection stressed by James.