The United American Catholic Church is called to be a missional church offering to everyone a spiritual home in which to live a Gospel-based life and fulfill the Great Commission of Christ:
 
Then Jesus came to them and said, “All authority in heaven and on earth has been given to me. Therefore go and make disciples of all nations, 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. And surely I am with you always, to the very end of the age.” (Matthew 28:18-20)
 
This Great Commission of Christ, this charge by the resurrected Jesus to his disciples to go out into the world and to make disciples of all peoples, baptizing them and teaching them the Word of God, is the calling, the mission, of the UACC.
 
Over the centuries, however, church—the church of baptized people—was “downsized,” in a sense, and became the church building. At best, perhaps, many of us learned that church is the Spirit contained within the bricks and mortar and stained glass windows, but church is nevertheless to be found in, and only in, the church building.
 
Yet Jesus told his followers to go out into the world; he did not say to wait until prospective disciples happen by and fill in the form that will add them to the mailing list. Thus we are missional, from the Latin words mittere, to send, and missio, the "act of sending."
 
A missional church, therefore, is less concerned about what happens at church and more concerned about what happens outside church, outside the church walls in the local community and in the wider world. And so we go out into the world to bring Jesus to the people and to bring the people to Jesus.
 
How we go out into the world takes a variety of forms and is reflected in the various ministries that currently comprise the UACC. We may be chaplains, counselors, social workers, or medical personnel. We may even be bankers, lawyers, accountants, assembly line workers, civil servants, or small business owners, for example. We can be all these things and still fulfill the Great Commission because what we do, in a way, is ultimately less significant, less powerful and long-lasting, than who we are and how we go out into the world. If we ourselves are disciples, if we ourselves bring God to people and people to God and if we do it as Jesus did, with kindness, love, peace and understanding in our hearts and minds, the what evolves so naturally that it almost seems to take care of itself.
 
Thus all other objectives, especially church membership, for so long the primary goal because it brings people into the church building and into the mindset that the church building is the church, become subordinate to and will succeed by accomplishing the only objective there is, really, perhaps best expressed in John 20:21.  "As the Father has sent me, so I send you."