See, the Lamb of God who takes away the sin of the world!

(John 1:29)

Granted, “the world is filled … with sin.” (The Watchtower, July 15, 1992, page 13) But “God loved the world” and thus he “did not send his Son into the world for him to judge the world, but for the world to be saved through him.” (John 3:16, 17) In actual fact, the purpose of Jesus’ sacrificial death was “to take away the sin of the world.” – The Watchtower, December 1, 2006, page 28.

Does this mean that all humans will be redeemed? No, the Bible clearly says “that some will never be saved.” (Reasoning From the Scriptures, page 358) It emphasises multiple times that “the world” will be saved – but “around the globe Jehovah’s Witnesses are noted for their being ‘no part of the world.’” (The Watchtower, April 15, 1996, page 21) Hence their sins will not be taken away by Jesus.