15. This wisdom--in which ye "glory," as if ye were "wise" (Jas 3:13, 14).
      descendeth not from above--literally, "is not one descending," &c.: "from the Father of lights" (true illumination and wisdom), Jas 1:17; through "the Spirit of truth," Joh 15:26.
      earthly--opposed to heavenly. Distinct from "earthy," 1Co 15:47. Earthly is what is IN the earth; earthy, what is of the earth.
      sensual--literally, "animal-like": the wisdom of the "natural" (the same Greek) man, not born again of God; "not having the Spirit" (Jude 19).
      devilish--in its origin (from "hell," Jas 3:6; not from God, the Giver of true wisdom, Jas 1:5), and also in its character, which accords with its origin. Earthly, sensual, and devilish, answer to the three spiritual foes of man, the world, the flesh, and the devil.

JFB.