But now ye rejoice, or, glory. We may learn from these words that James condemned something more than a passing speech. Ye rejoice, or, glory, he says, in your empty boastings. Though they robbed God of his government, they yet flattered themselves; not that they openly set themselves up as superior to God, though they were especially inflated with confidence in themselves, but that their minds were inebriated with vanity so as to disregard God. And as warnings of this kind are usually received with contempt by ungodly men -- nay, this answer is immediately given, "known to ourselves is what is offered to us, so that there is no need of such a warning;" -- he alleges against them this knowledge in which they gloried, and declares that they sinned the more grievously, because they did not sin through ignorance, but through contempt.

But now ye rejoice in your boastings - That is, probably, in your boastings of what you can do; your reliance on your own skill and sagacity. You form your plans for the future as if with consummate wisdom, and are confident of success. You do not anticipate a failure; you do not see how plans so skilfully formed can fail. You form them as if you were certain that you would live; as if secure from the numberless casualties which may defeat your schemes.
All such rejoicing is evil - It is founded on a wrong view of yourselves and of what may occur. It shows a spirit forgetful of our dependence on God; forgetful of the uncertainty of life; forgetful of the many ways by which the best-laid plans may be defeated. We should never boast of any wisdom or skill in regard to the future. A day, an hour may defeat our best-concerted plans, and show us that we have not the slightest power to control coming events.

But now ye rejoice in your boastings - Ye glory in your proud and self-sufficient conduct, exulting that ye are free from the trammels of superstition, and that ye can live independently of God Almighty. All such boasting is wicked, πονηρα εστιν, is impious. In an old English work, entitled, The godly man's picture drawn by a Scripture pencil, there are these words: "Some of those who despise religion say, Thank God we are not of this holy number! They who thank God for their unholiness had best go ring the bells for joy that they shall never see God."

But now ye rejoice in your boastings,.... Of tomorrow, and of the continuance of life, and of going to such a place, and abiding there for such a time, and of trading and trafficking with great success, to the obtaining of much gain and riches; see Proverbs 27:1
all such rejoicing is evil; wicked and atheistical, as expressing a neglect of and independence on Providence; arrogating and ascribing too much to themselves, their power and will, as if they had their lives and fortunes in their own hands, and at their own dispose, when all depend upon the will of God. The Syriac version renders it, "all such rejoicing is from evil"; from an evil heart, and from the evil one, Satan.

now--as it is.
rejoice in . . . boastings--"ye boast in arrogant presumptions," namely, vain confident fancies that the future is certain to you (James 4:13).
rejoicing--boasting [BENGEL].