The Book of Hebrews is written to Jewish converts, who, because of persecutions, as well as fear and doubts about their Christian faith, are tempted to revert back to traditional Judaism and its Temple-centered worship. This epistle aims to keep these Jewish Christians in the fold by stressing the failure of the Old Covenant; that the rituals of sacrificing animals has been replaced by the superiority of the New Covenant of Jesus Christ who is the true sacrificial lamb who shed His blood for us. The New Covenant does what the Old Covenant could not do: free us from sin.
The Epistle of James deals with a variety of themes, with an emphasis on practical aspects of the Christian life. Some topics covered in this epistle include how to handle trials and temptations, understanding the relation between faith and works, how to tame our tongues, being a friend of God rather than a friend of the world, and the value of humility, patience and prayer. James challenges followers of Christ to not just "talk the talk" but to "walk the walk". This epistle also shows that faith alone cannot save us because it is not verified by the works that always accompany true faith (Ephesians 2:10).