God's Word has been likened to many things: seed (Luke 8:11), a cleansing agent (John 15:3), gold and honey (Ps 19:10) and a sword (Eph 6:17). Now James says that it is also like a mirror.
Surely, those who believe in the Lord (who submit to Him as their Master) Jesus (who are grateful to Him as their Saviour) Christ (and who accept that He is God's anointed one to bring righteousnes
It is a worldly habit to make friends with rich people in the hope that they will meet your needs. Jesus did not do that, because He was trusting in Father God to provide for Him.
If you really keep the royal law found in Scripture, 'Love your neighbour as yourself,' you are doing right. But if you show favouritism, you sin and are convicted by the law as law-breakers. (NIVUK)
James has been telling us that favouritism is not a godly way to behave, and so he now concludes by looking ahead to the time when we have our lifetime's 'appraisal' with Jesus.
Many people claim to have faith, but how do we know if it is real? True faith in Jesus Christ brings salvation (cf Acts 16:31) from sin's domination and from hell itself.