James 1:20 MEANING

James 1:20
(20) For the wrath of man worketh not the righteousness of God.--Sarcastically rings the context. Perhaps there is still a sharper point to the satire: the wrath of man does not work God's righteousness "to the full." The warning may well be sounded in the ears of Christians still, who are not less apt than Jonah of old to say quickly and in self-excuse, "I do well to be angry" (Jonah 4:9). How many a holy work of household and parish has been and is thus hindered and destroyed; and if the golden words of the first bishop of the Church had been heeded better, there never had appeared one page of her long history blotted with the blood of a religious war.

Verse 20 gives the reason why men should be slow to wrath. Because man's wrath does not work God's righteousness δικαιοσύνην Θεοῦ), the righteousness which God demands and requires.

1:19-21 Instead of blaming God under our trials, let us open our ears and hearts to learn what he teaches by them. And if men would govern their tongues, they must govern their passions. The worst thing we can bring to any dispute, is anger. Here is an exhortation to lay apart, and to cast off as a filthy garment, all sinful practices. This must reach to sins of thought and affection, as well as of speech and practice; to every thing corrupt and sinful. We must yield ourselves to the word of God, with humble and teachable minds. Being willing to hear of our faults, taking it not only patiently, but thankfully. It is the design of the word of God to make us wise to salvation; and those who propose any mean or low ends in attending upon it, dishonour the gospel, and disappoint their own souls.For the wrath of man worketh not the righteousness of God. This is so far from engaging persons to do that which is right and acceptable in the sight of God, that it puts them upon doing that which is evil. The Alexandrian copy reads, "with the wrath of men do not work the righteousness of God"; do not attend upon the word and ordinances of God with a wrathful spirit. Compare, with this, 1 Timothy 2:8.
Courtesy of Open Bible