"That your heart beats with God’s in his pursuit of worshipers from every tribe and tongue and people and nation is the primary issue."

Tony Reinke:

How can a Christian live out his obedient, quiet life in suburban America (1 Thessalonians 4:9–12), and also participate in radical, global, cross-cultural missions (Luke 24:45–47)?
This is an important question, but it’s also a question loaded with tensions — healthy tensions I think. It seems to me the best answer is found in the trinitiarian categories of sender and sent, or goer and sender. 

Here’s how the point was articulated back in the late 1990s at Bethlehem Baptist Church in Minneapolis, and published as an appendix in the book, A Holy Ambition: To Preach Where Christ Has Not Been Named (2011), page 159: 

Driving Convictions Behind Cross-Cultural MissionsJohn Piper
January 1, 1996 

… Conviction #13 — Our Aim Is Not to Persuade Everyone to Become a Missionary, But to Help Everyone Become a World Christian. 

There are only three kinds of people: goers, senders, and the disobedient. It’s not God’s will for everyone to be a “goer.” Only some are called to go out for the sake of the name to a foreign culture (e.g., Mark 5:18–19). 

Those who are not called to go out for the sake of the name are called to stay for the sake of the name, to be salt and light right where God has placed them, and to join others in sending those who are called to be cross-cultural missionaries. 

In God’s eyes both the goers and the senders are crucial. There are no first and second class Christians in God’s hierarchy of values. Together the goers and the senders are “fellow-workers with the truth” (3 John 8). 

So whether you are a goer or a sender is a secondary issue. That your heart beats with God’s in his pursuit of worshipers from every tribe and tongue and people and nation is the primary issue. This is what it means to be a World Christian. 

Of course this all assumes (1) a commitment to a local church, and (2) a local church’s commitment to the global advance of the gospel. When those are in place, the goer and sender categories help make sense of it all.