James 4:2-3

Ye lust Επιθυμειτε, ye covet, or eagerly desire; and have not What you desire; you are, some way or other, hindered from attaining that of which you are so greedy; ye kill In your heart; for he that hateth his brother is a murderer. Or he speaks of the actual murders which the carnal Jews, called zealots, committed of the heathen, and even those of their own nation who opposed them. Accordingly, he says, ye kill, Και ζηλουτε, and are zealous, thereby showing, evidently, that the persons to whom he spake were zealots. Ye fight and war, yet ye have not What ye so eagerly desire; because ye ask not And no marvel; for a man full of evil desire, of malice, envy, hatred, cannot pray. Since, as appears by this, the persons to whom the apostle is speaking failed of their purpose, because they did not pray to God, it shows, says Macknight, “that some of their purposes, at least, were laudable, and might have been accomplished with the blessing of God. Now this will not apply to the Judaizing teachers in the church, who strongly desired to subject the converted Gentiles to the law of Moses. As little will it apply to those who coveted riches. The apostle's declaration agrees only to such of the unconverted Jews as endeavoured to bring the heathen to the knowledge and worship of the true God. So far their attempt was commendable, because, by converting the Gentiles to Judaism, they prepared them for receiving the gospel; and if for this they had asked the blessing of God sincerely, they might have been successful in their purpose.” Ye ask, &c. But if ye do ask, ye receive not, because ye ask amiss Κακως αιτεισθε, ye ask wickedly, from sinful motives. Some understand this of the Jews praying for the goods of this life: “But though,” says Macknight, “such a prayer had been allowable, the apostle scarcely would have spoken of it here, as it had no connection with his subject. His meaning, in my opinion, is, that they prayed for success in converting the heathen, not from any regard to the glory of God and the salvation of the heathen, but from a desire to draw money from them whom they converted, to spend on their own lusts.”