James also mentioned the examples of the Old Testament, such as Abraham, Rahab, the prophets, Job, and Elijah, as being a means for Christian perfection (2:23-25; 5:10-11, 17-18).
James 3:9 says that with our tongue "we bless the Lord and Father, and with it we curse men, who have been made according to the likeness of God." James pointed out that although man is sinful, he still bears the likeness of God. So if we curse any man, that means that we curse a person made by God after His likeness. This becomes a kind of incentive to help us not to curse, so to James this was a means of Christian perfection.
James also spoke of our need to confide in the Lord (4:15).
James 5:8 says, "You also be long-suffering; establish your hearts because the coming of the Lord has drawn near." When we think about the Lord's coming back, we will behave properly. His coming back is a means of carrying out Christian perfection in the book of James.
James mentions prayer as a means in 5:14-15.