Anyway, I fear that many Christians take this same approach to the mission we have been given. We think that God is saying "This is your mission, should you choose to accept it." The problem is that this isn't really a choice. Either you are a follower of Christ, or you're not. There is no middle ground, and once you have chosen to follow Him, you have chosen to be part of His mission. The great commission, in case you don't know, is to go "into all the nations" and "make disciples".
I will admit that there are similarities to the missions of the movies. It can be dangerous. It's a risk to take something into the world which they may reject. It can also seem impossible. The problem is that because of the danger, many bow out, thinking they can be a follower of Jesus without actually following Him into the world.
In his book "The Forgotten Ways", Alan Hirsch tells us that the early church in a period of 210 years, grew from around 25,000 to 200,000,000. That is a lot of growth, and they did it without so many of the things we take for granted. They didn't have buildings for the most part, because for much of that time it was illegal to be a Christian. They didn't have structure, and they didn't have the New Testament. They would have had portions, but that was really it. They didn't have seminaries to train their leaders, and they didn't have worship teams and overhead projection. Interestingly enough, they even made it harder for you to join the church than most of us would even dream of today.
So what did they have? They had the Holy Spirit, and they had the commission of Christ. They took those things and went out. This is our call today. Let us not wait until we are trained or educated enough, but call on God's Spirit and move out in obedience.