mission, Jesus' commission
The Church and mission are one. Two thousand years ago our Lord Jesus Christ returned to heaven and gave his followers the commission to make disciples of all peoples of the earth, ‘baptizing them in the name of the Father and of the Son and of the Holy Spirit, and teaching them to obey everything I have commanded you.’ That’s what mission is about: making disciples for Jesus.
Because Jesus also said ‘and surely I am with you always, to the very end of the age’, we are still obeying that commission. Till He returns.