In this final verse of the chapter James reiterates with another metaphor the same point he has been making all along in this section: that a workless faith does not “work,” it cannot save, it is dead. He begins with a common anthropological image: “For just as the body without the spirit is dead” (Hōsper gar to sōma chōris pneumatos nekron estin). It is possible to translate pneumatos as “breath” in which case James is stating a simple biological fact. Most English translations render the term as “spirit,” drawing on familiar biblical imagery that assumes that the spirit animates and gives life to the body (so McKnight, 258). The point of the verse, however, is neither biology nor anthropology but the relation of faith and works.
Thus, just as the body without the spirit is dead and lifeless, “so faith without works is also dead” (houtōs kai hē pistis chōris ergon nekra estin)—lifeless, unproductive and impotent. The faith of which James speaks is “that faith” of verse 14, the faith which is faith only as confession in verse 19, the workless faith of verse 20, faith which is alone in verse 24. This is not faith at all in its true New Testament sense. True faith, for James, is inseparable from works of obedience toward God and mercy toward others. The faith which we rest in the good and generous God, calls forth a similar character in those who believe, such that their lives too, become good and generous toward others.