Who is a wise man. As the lust of slandering arises mostly from pride, and as the false conceit of wisdom for the most part generates pride, he therefore speaks here of wisdom. It is usual with hypocrites to exalt and shew off themselves by criminating all others, as the case was formerly with many of the philosophers, who sought glory for themselves by a bitter abuse of all other orders. Such haughtiness as slanderous men swell with and are blinded by, James checked, by denying that the conceit of wisdom, with which men flatter themselves, has in it anything divine; but, on the contrary, he declares that it proceeds from the devil. Then the meaning is, that supercilious censors, who largely indulge themselves, and at the same time spare none, seem to themselves to be very wise, but are greatly mistaken; for the Lord teaches his people far otherwise, even to be meek, and to be courteous to others. They, then, are alone wise in the sight of God, who connect this meekness with an honest conversation; for they who are severe and inexorable, though they may excel others in many virtues, do not yet follow the right way of wisdom. [1] l4 But if ye have bitter envying. He points out the fruits which proceed from that extreme austerity which is contrary to meekness; for immoderate rigor necessarily begets mischievous emulations, which presently break forth into contentions. It is, indeed, an improper mode of speaking, to place contentions in the heart; but this affects not the meaning; for the object was to shew that the evil disposition of the heart is the fountain of these evils. He has called envying, or emulation, bitter; for it prevails not, except when minds are so infected with the poison of malignity, that they turn all things into bitterness. [2] That we may then really glory that we are the children of God, he bids us to act calmly and meekly towards our brethren; otherwise he declares that we are lying in assuming the Christian name. But it is not without reason that he has added the associate of envying, even strife, or contention, for contests and quarrels ever arise from malignity and envy.

Footnotes

1 - "Who is wise and intelligent among you?" let him by a good conduct shew his works in meekness of wisdom." The arrangement here is according to what is common in scripture: Wisdom the effect first, then knowledge the cause or what precedes it. In what follows the order is reversed; knowledge distinguishes between good and bad works, and the good ought to be exhibited with that meekness which wisdom dictates.

2 - A similar order as to the words is found here as in the former verse: bitter envying is occasioned by strife of contention. There may be envying without contention, but it is contention that commonly makes it bitter.

Who is a wise man, and endued with knowledge among you? - This is spoken with reference to the work of public teaching; and the meaning of the apostle is, that if there were such persons among them, they should be selected for that office. The characteristics here stated as necessary qualifications, are wisdom and knowledge. Those, it would seem, on which reliance had been placed, were chiefly those which were connected with a ready elocution, or the mere faculty of speaking. The apostle had stated the dangers which would follow if reliance were placed on that alone, and he now says that something more is necessary, that the main qualifications for the office are wisdom and knowledge. No mere power of speaking, however eloquent it might be, was a sufficient qualification. The primary things to be sought in reference to that office were wisdom and knowledge, and they who were endowed with these things should be selected for public instructors.
Let him show out of a good conversation - From a correct and consistent life and deportment. On the meaning of the word "conversation," see the notes at Philippians 1:27. The meaning here is, that there should be an upright life, and that this should be the basis in forming the judgment in appointing persons to fill stations of importance, and especially in the office of teaching in the church.
His works - His acts of uprightness and piety. He should be a man of a holy life.
With meekness of wisdom - With a wise and prudent gentleness of life; not in a noisy, arrogant, and boastful manner. True wisdom is always meek, mild, gentle; and that is the wisdom which is needful, if men would become public teachers. It is remarkable that the truly wise man is always characterized by a calm spirit, a mild and placid demeanor, and by a gentle, though firm, enunciation of his sentiments. A noisy, boisterous, and stormy declaimer we never select as a safe counsellor. He may accomplish much in his way by his bold eloquence of manner, but we do not put him in places where we need far-reaching thought, or where we expect the exercise of profound philosophical views. In an eminent degree, the ministry of the gospel should be characterized by a calm, gentle, and thoughtful wisdom - a wisdom which shines in all the actions of the life.

Who is a wise man - One truly religious; who, although he can neither bridle nor tame other men's tongues, can restrain his own.
And endued with knowledge - Και επιστημων· And qualified to teach others.
Let him show - Let him by a holy life and chaste conversation show, through meekness and gentleness, joined to his Divine information, that he is a Christian indeed; his works and his spirit proving that God is in him of a truth; and that, from the fullness of a holy heart, his feet walk, his hands work; and his tongue speaks. We may learn from this that genuine wisdom is ever accompanied with meekness and gentleness. Those proud, overbearing, and disdainful men, who pass for great scholars and eminent critics, may have learning, but they have not wisdom. Their learning implies their correct knowledge of the structure of language, and of composition in general; but wisdom they have none, nor any self-government. They are like the blind man who carried a lantern in daylight to keep others from jostling him in the street. That learning is not only little worth, but despicable, that does not teach a man to govern his own spirit, and to be humble in his conduct towards others.

(9) Who [is] a wise man and endued with knowledge among you? let him shew out of a good conversation his works with meekness of wisdom.
(9) The eighth part, which goes with the former concerning meekness of mind, against which he sets envy and a contentious mind: in the beginning he shuts the mouth of the main fountain of all these mischiefs, that is, a false persuasion of wisdom, whereas nonetheless there is no true wisdom, but that which is heavenly, and shapes our minds to all types of true discipline and modesty.

Who is a wise man. Meaning, not in things natural and civil, or merely moral, but in things spiritual: and he is a wise man, who is both wise to do good, and wise unto salvation; who has learned to know his own ignorance, folly, and stupidity; for the first lesson in the school of spiritual wisdom is for a man to know that he is a fool: and he is a wise man who considers his latter end, thinks of a future state, and what will become of him in another world; and who builds his faith and hope of eternal salvation on the sure and only foundation, the rock Christ Jesus; and who takes up a profession of religion upon principles of grace, and with views to the glory of God, and, upon mature deliberation, reckoning the cost, and what he must expect to meet with; and which he holds fast, without wavering, and yet does not depend upon it; and who walks circumspectly, and with wisdom, towards them that are without; and who observes both providences and promises, for the encouragement of his faith; and keeps looking to the mark for the prize, preferring heavenly things to earthly ones.
And endued with knowledge amongst you? as he is, who is endued with the knowledge of himself; of the impurity of his nature, and the plague of his heart; and of his impotency and inability to do any thing that is spiritually good of himself; and of the imperfection and insufficiency of his righteousness to justify him before God; and of his lost state and condition by nature, how deserving of the wrath of God, and obnoxious to the curses of the law; and how miserable he must be without the grace of God and righteousness of Christ: and who is also endued with the knowledge of Christ, so as to see a fulness, suitableness, and ability in him as a Saviour; so as to love him, approve of him, as such, and trust in him; which knowledge is always practical and soul humbling; and the least degree of it saving; and though it is imperfect, it is growing, and will at last come to perfection: now such a man is a Gnostic, in the best sense; for this question is put with a view to the Gnostics of those times, who valued themselves upon their knowledge, and despised practical religion and godliness: hence it follows,
let him show out of a good conversation his works, with meekness of wisdom; such an one ought to perform good works, and he will perform them; and it is right in him to show them forth, that they may be a means of others glorifying God upon the sight of them; and that they may be evidences of the truth of faith in themselves to others; and that they may be for the imitation of others; and that they may put to silence, and stop the mouths of false accusers, and adorn the Gospel, and recommend religion: and these should be shown forth "out of a good conversation"; not in a single act or two, but in a series and course of living; which may be said to be good, when it is ordered aright, according to the word of God, and is honest among the Gentiles, and upright and holy; and is as becomes the Gospel of Christ, and is worthy of the calling of God to grace and glory; and when it is influenced by the grace of God: and the works shown out of it, and in it, are done in faith, from love in the strength of Christ, and are directed to the glory of God: and all this should be "with meekness of wisdom"; in a wise and humble manner, without trusting to, and depending upon, such works for justification and salvation; and without glorying in them, and boasting of them; acknowledging the deficiency and imperfection of them, and his own weakness in the performance of them; and ascribing them to the power and grace of God, by the assistance of which they are performed.

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.

Who--(Compare Psalm 34:12-13). All wish to appear "wise": few are so.
show--"by works," and not merely by profession, referring to James 2:18.
out of a good conversation his works--by general "good conduct" manifested in particular "works." "Wisdom" and "knowledge," without these being "shown," are as dead as faith would be without works [ALFORD].
with meekness of wisdom--with the meekness inseparable from true "wisdom."

Who is a wise man? Discreet and well informed? It must be shown in conversation, that is, in life, both words and deeds, meekness of wisdom. True wisdom will not speak boastfully.
Glory not. If there is bitterness in the heart, let there be no boasting of your goodness. That would be to lie against the truth.
This wisdom. Wisdom (not real wisdom but false) which gives rise to envy and strife is not from heaven. It is earthly, of the passions, of the devil, not of God.
For where, etc. Where these exist in the heart every evil work will follow.

Let him show his wisdom as well as his faith by his works; not by words only.