What comes to your mind when you hear the word "missionary"?
After Jesus was raised from the dead, He appeared to His Disciples and gave to them what we call "the Great Commission". This mission that He gave to them flows from His authority over all things and is backed by His promise to always be with them.
The mission consists of going, making disciples, baptizing, and teaching obedience to Christ. All followers are called to this life-long pursuit, while churches play a vital role in equipping for this pursuit. One of the best parts of this mission is that the Resurrected King that is sending, has already set the example of how to be on mission. So believers strive to be faithful in following His example, and trust Him to work through them.