He Himself is the propitiation for our sins, and not for ours only but also for the whole world —1 John 2:2
The key to the missionary’s message is the propitiation of Christ Jesus— His sacrifice for us that completely satisfied the wrath of God. Look at any other aspect of Christ’s work, whether it is healing, saving, or sanctifying, and you will see that there is nothing limitless about those. But— “The Lamb of God who takes away the sin of the world!”— that is limitless (John 1:29). The missionary’s message is the limitless importance of Jesus Christ as the propitiation for our sins, and a missionary is someone who is immersed in the truth of that revelation.