Mission theology is concerned with the participation of the church in God's mission to and in the world. Both theologically and empirically it is impossible to separate the church from mission. Indeed mission is the very life of the Church; and the mission theology of the church has developed in ecumenical discussion over the 20th and 21st centuries.

Kim, K. (2010). Mission Theology of the Church. International Review Of Mission, 99 (1), 39.(viewed 24/0/2013) doi:10.1111/j.1758-6631.2010.00035.x

Mission is our participation in God's existence in the world. The Church exists to be a sacrament of, to be inolved in and to promote God's plan for the world. So in a real sense the church does not have a mission. Mission is the reason for its existence. It is 'the "business" that calls the church forth'. (Bevans, 2005, 49)

In Catholic Australia, (viewed 25 September 2013), http://www.catholicaustralia.com.au/page.php?pg=mission-motherofthechurch04