3:13-18 These verses show the difference between men's pretending to be wise, and their being really so. He who thinks well, or he who talks well, is not wise in the sense of the Scripture, if he does not live and act well. True wisdom may be know by the meekness of the spirit and temper. Those who live in malice, envy, and contention, live in confusion; and are liable to be provoked and hurried to any evil work. Such wisdom comes not down from above, but springs up from earthly principles, acts on earthly motives, and is intent on serving earthly purposes. Those who are lifted up with such wisdom, described by the apostle James, is near to the Christian love, described by the apostle Paul; and both are so described that every man may fully prove the reality of his attainments in them. It has no disguise or deceit. It cannot fall in with those managements the world counts wise, which are crafty and guileful; but it is sincere, and open, and steady, and uniform, and consistent with itself. May the purity, peace, gentleness, teachableness, and mercy shown in all our actions, and the fruits of righteousness abounding in our lives, prove that God has bestowed upon us this excellent gift.

14. if ye have—as is the case (this is implied in the Greek indicative).

bitter—Eph 4:31, "bitterness."

envying—rather, "emulation," or literally, "zeal": kindly, generous emulation, or zeal, is not condemned, but that which is "bitter" [Bengel].

strife—rather, "rivalry."

in your hearts—from which flow your words and deeds, as from a fountain.

glory not, and lie not against the truth—To boast of your wisdom is virtually a lying against the truth (the gospel), while your lives belie your glorying. Jas 3:15; Jas 1:18, "The word of truth." Ro 2:17, 23, speaks similarly of the same contentious Jewish Christians.