James asks what causes quarrels and what causes fights among you, and answers: your passions are at war within you. You desire and do not have, so you murder; you covet and cannot obtain, so you fight and quarrel. You do not have because you do not ask, and when you ask you ask wrongly, to spend it on your passions. He calls those who cultivate friendship with the world adulterous people, for friendship with the world is enmity with God. God yearns jealously over the spirit he has made to dwell in us, and he gives more grace; therefore Scripture says that God opposes the proud but gives grace to the humble.
Then come a series of commands: submit yourselves to God; resist the devil and he will flee from you; draw near to God and he will draw near to you; cleanse your hands, you sinners, and purify your hearts, you double-minded. Be wretched and mourn and weep; let your laughter be turned to mourning and your joy to gloom. Humble yourselves before the Lord and he will exalt you.
He then turns to slander: do not speak evil against one another, brothers; the one who speaks against a brother or judges his brother speaks evil against the law and judges the law; and if you judge the law, you are not a doer of the law but a judge. There is only one lawgiver and judge, he who is able to save and to destroy; who are you to judge your neighbor?
The chapter ends with a warning to those who plan without God. Some say today or tomorrow we will go into such a town and spend a year there and trade and make a profit, though they do not know what tomorrow will bring, for they are a mist that appears for a little time and then vanishes. Instead they ought to say, if the Lord wills, we will live and do this or that. To boast in arrogance is evil. And whoever knows the right thing to do and fails to do it, for him it is sin.