Only our risen Lord has authority to define the mission of the church and He has defined it as on-the-go disciplemaking. Our role is to know Him and carry out His mission. He has given us the power to do so through His promised presence realized through the infilling of the Holy Spirit.
The mysterious journey to Emmaus was marked by the presence of the resurrected Jesus. His conversation with the two men cited Moses and the prophets in order to explain the life and death of Jesus. The story he told must have been a glorious recounting of the presence of God that is represented in our midst.