Missions work has always been special to God. God has always been fundamentally driven by a missionary heart. Therefore, when He calls missionaries to do His work, He is calling all people to participate in the work that has driven the history of God’s work in the world from Eden to the present day.
Missions work is an extension of God’s love for the world through the church to all people, following the example of Christ:
John 3:16
“For God so loved the world, that he gave his only Son, that whoever believes in him should not perish but have eternal life”