What does it mean that Christ is the propitiation for the whole world?

In 1 John 2:2, it states that Jesus is 'the propitiation for our sins, and not for ours only, but also for the sins of the whole world.' This means that the message of Christ's atonement extends universally; the actual saving effect of that atonement applies only to those who are in Christ. The phrase 'sins of the whole world' emphasizes God's mercy and grace available to all, affirming His desire for men to come to repentance and faith. It highlights God's kindness in offering salvation freely, yet the actual benefit is reserved for the elect, those who will respond to the Gospel through faith.