But wilt thou know - Will you have a full demonstration of it; will you have the clearest proof in the case. The apostle evidently felt that the instances to which he was about to refer, those of Abraham and Rahab, were decisive.

O vain man - The reference by this language is to a man who held an opinion that could not be defended. The word "vain" here used (κενε kene) means properly "empty," as opposed to "full" - as empty hands, having nothing in them; then fruitless, or without utility or success; then false, fallacious. The meaning here, properly, would be "empty," in the sense of being void of understanding; and this would be a mild and gentle way of saying of one that he was foolish, or that he maintained an argument that was without sense. James means, doubtless, to represent it as a perfectly plain matter, a matter about which no man of sense could have any reasonable doubt. If we must call a man foolish, as is sometimes necessary, let us use as mild and inoffensive a term as possible - a term which, while it will convey our meaning, will not unnecessarily wound and irritate.

That faith without works is dead - That the faith which does not produce good works is useless in the matter of salvation. He does not mean to say that it would produce no effect, for in the case of the demons it did produce trembling and alarm; but that it would be valueless in the matter of salvation. The faith of Abraham and of Rahab was entirely different from this.

But wilt thou know - Art thou willing to be instructed in the nature of true saving faith? Then attend to the following examples.

But wilt thou know, O vain man,.... These are the words of the apostle reassuming the argument, that faith without works is dead, useless, and unprofitable; and the man that boasts of his faith, and has no works to show it, he calls a "vain man", an empty one, sounding brass, and a tinkling cymbal; empty vessels make the greatest sound; such are proud boasters, vainly puffed up by their fleshly mind; but are empty of the true knowledge of God, and of the faith of Christ, and of the grace of the Spirit: the Syriac version renders it, "O weak", or "feeble man", as he must needs be, whose faith is dead, and boasts of such a lifeless thing; and the Ethiopic version renders it, "O foolish man", for such an one betrays his ignorance in spiritual things, whatever conceit he has of his knowledge and understanding: the character seems levelled against the Gnostics, who were swelled with a vain opinion of their knowledge, to whom the apostle addresses himself thus. The phrase, "vain man", is a proper interpretation of the word "Raca", or Reka, used in Matthew 5:22; see Gill on Matthew 5:22, which though not to be said to a man in an angry way, yet may be applied to men of such a character as here described; who were empty of solid good, and yet boasted of their knowledge. "Wilt thou know?" dost thou require proofs,

that faith, without works, is dead? as in James 2:17 and that true faith has always works accompanying it, and is shown and known by it? then take the following instances.

Vain (κενέ)

Lit., empty, without spiritual life.

Dead (νεκρά)

But the best texts read ἀργή, idle; as of money which yields no interest, or of land lying fallow.

{11} But wilt thou know, O vain man, that faith without works is dead?

(11) The third reason from the example of Abraham, who no doubt had a true faith: but he in offering his son, showed himself to have that faith which was not without works, and therefore he received a true testimony when it was laid, that faith was imputed to him for righteousness.

2:20 But wilt thou know, O vain man. I will show by proof that the faith that justifies produces works by the case of Abraham, the great father of the faithful.

Faith without works is dead. It has no power to make alive unless it has power over the life.

2:20 But art than willing to know - Indeed thou art not: thou wouldest fain be ignorant of it. O empty man - Empty of all goodness. That the faith which is without works is dead - And so is not properly faith, as a dead carcase is not a man.

20. wilt thou know-"Vain" men are not willing to know, since they have no wish to "do" the will of God. James beseeches such a one to lay aside his perverse unwillingness to know what is palpable to all who are willing to do.

vain-who deceivest thyself with a delusive hope, resting on an unreal faith.

without works-The Greek, implies separate from the works [Alford] which ought to flow from it if it were real.

is dead-Some of the best manuscripts read, "is idle," that is, unavailing to effect what you hope, namely, to save you.

2:14-26 Those are wrong who put a mere notional belief of the gospel for the whole of evangelical religion, as many now do. No doubt, true faith alone, whereby men have part in Christ's righteousness, atonement, and grace, saves their souls; but it produces holy fruits, and is shown to be real by its effect on their works; while mere assent to any form of doctrine, or mere historical belief of any facts, wholly differs from this saving faith. A bare profession may gain the good opinion of pious people; and it may procure, in some cases, worldly good things; but what profit will it be, for any to gain the whole world, and to lose their souls? Can this faith save him? All things should be accounted profitable or unprofitable to us, as they tend to forward or hinder the salvation of our souls. This place of Scripture plainly shows that an opinion, or assent to the gospel, without works, is not faith. There is no way to show we really believe in Christ, but by being diligent in good works, from gospel motives, and for gospel purposes. Men may boast to others, and be conceited of that which they really have not. There is not only to be assent in faith, but consent; not only an assent to the truth of the word, but a consent to take Christ. True believing is not an act of the understanding only, but a work of the whole heart. That a justifying faith cannot be without works, is shown from two examples, Abraham and Rahab. Abraham believed God, and it was reckoned unto him for righteousness. Faith, producing such works, advanced him to peculiar favours. We see then, ver. 24, how that by works a man is justified, not by a bare opinion or profession, or believing without obeying; but by having such faith as produces good works. And to have to deny his own reason, affections, and interests, is an action fit to try a believer. Observe here, the wonderful power of faith in changing sinners. Rahab's conduct proved her faith to be living, or having power; it showed that she believed with her heart, not merely by an assent of the understanding. Let us then take heed, for the best works, without faith, are dead; they want root and principle. By faith any thing we do is really good; as done in obedience to God, and aiming at his acceptance: the root is as though it were dead, when there is no fruit. Faith is the root, good works are the fruits; and we must see to it that we have both. This is the grace of God wherein we stand, and we should stand to it. There is no middle state. Every one must either live God's friend, or God's enemy. Living to God, as it is the consequence of faith, which justifies and will save, obliges us to do nothing against him, but every thing for him and to him.