2. Ye lust--A different Greek word from that in Jas 4:1. "Ye desire"; literally, "ye set your mind (or heart) on" an object.
      have not--The lust of desire does not ensure the actual possession. Hence "ye kill" (not as Margin, without any old authority, "envy") to ensure possession. Not probably in the case of professing Christians of that day in a literal sense, but "kill and envy" (as the Greek for "desire to have" should be translated), that is, harass and oppress through envy [DRUSIUS]. Compare Zec 11:5, "slay"; through envy, hate, and desire to get out of your way, and so are "murderers" in God's eyes [ESTIUS]. If literal murder [ALFORD] were meant, I do not think it would occur so early in the series; nor had Christians then as yet reached so open criminality. In the Spirit's application of the passage to all ages, literal killing is included, flowing from the desire to possess so David and Ahab. There is a climax: "Ye desire," the individual lust for an object; "ye kill and envy," the feeling and action of individuals against individuals; "ye fight and war," the action of many against many.
      ye have not, because ye ask not--God promises to those who pray, not to those who fight. The petition of the lustful, murderous, and contentious is not recognized by God as prayer. If ye prayed, there would be no "wars and fightings." Thus this last clause is an answer to the question, Jas 4:1, "Whence come wars and fightings?"

JFB.