When people say yes to becoming a missionary, to what exactly are they saying yes?

When people say yes to becoming a missionary, to what exactly are they saying yes?
Missionary stories don’t often go viral, but John Allen Chau’s death elicited strong reactions.
When I think about mission in my context in Chicago, I think about the global South. Ideas from a missionary to India give shape to mission in my backyard.
If our churches have to be a little more uncomfortable to us insiders in order to reach even one lost soul for Christ, that’s a sacrifice we should all be willing to make.
In many ways, we have moved closer to a biblical understanding of the gospel and of life, closer to a worldview that calls Christians to "walk in God's ways" in every area of their lives. And yet, a fundamental problem remains.