15 Do not love the world nor the things in the world. If anyone loves the world, the love of the Father is not in him. 16 For all that is in the world, the lust of the flesh and the lust of the eyes and the boastful pride of life, is not from the Father, but is from the world.
17 The world is passing away, and also its lusts; but the one who does the will of God lives forever.
1 John 2:15-17 (NASB)
The text begins with a command—it’s the only command in the text and therefore probably the main point. Verse 15a: “Do not love the world or the things in the world.” Everything else in the text is an argument, or incentive, for why we should not love the world.
The first incentive John gives is that “if any one loves the world, love for the Father is not in him” (verse 15b). In other words the reason you shouldn’t love the world is that you can’t love the world and God at the same time. Love for the world pushes out love for God, and love for God pushes out love for the world.
As Jesus said, “No one can serve two masters; for either he will hate the one and love the other, or he will be devoted to the one and despise the other. You cannot serve God and money” (Matthew 6:24). So don’t love the world, because that would put you in the class with the God-haters whether you think you are or not. “If any one loves the world, love for the Father is not in him.” That’s the first reason John gives not to love the world.
Then in verse 16 comes the support and explanation of that first argument. The reason love for the world pushes out love for God is that “all that is in the world, the lust of the flesh and the lust of the eyes and the pride of life, is not of the Father but is of the world.” Leave out those three phrases in the middle of verse 16 and it would read like this: The reason love for the world excludes love for God is that all that is in the world is not of God. In other words it’s just empty talk to say that you love God if you love what is not of God.
John could have rested his case at the end of verse 16. Don’t love the world because love for the world can’t coexist with love for God. But he doesn’t rest his case here. He adds two more arguments—two more incentives not to love the world.