It is interesting that John contrasts love for the world with love for God. One passes away, but the other goes on forever. We foolishly desire the passing things that the world offers instead of the everlasting will of God. The will of God extends beyond this temporal world. A missionary who was later martyred summed it up well: “He is no fool who gives up what he cannot keep in order to gain what he cannot lose.”
So if you are pursuing the world and its desires—success in business, a glowing reputation, sexual satisfaction, power, and so on—be warned, they will all pass away.
But the person who does the will of God will live forever. God’s law, which tells us to love him and our neighbor, is his everlasting will. It carries forward into the next world.
If we need motivation for keeping the law of God, there is no motivation greater than this. Do you desire life everlasting? Then do the will of God and live forever.