This also happens in liturgy, but not solely through liturgy. Worshipers are joined to each other, sharing life and burdens, sharing joy in believing, encouraging one another on to love and good works in daily life. Such fellowship is rooted in the fellowship we have with Christ in the liturgy of the Eucharist. Here is a mission function set before us by Jesus. It is to live as servants in the world, seeking to do good to God's creation and to the people of God's creation.
Service is offered without any expectation of response from the ones served.
It is enough that their lives are better and more complete. Lutherans are known for their charity and service. This is another mission function. To witness is to testify to the mighty and loving acts of God and the saving acts of Jesus. The testimony includes an invitation for hearers to believe and to embrace the Good News, to be joined to the church and to shape life with Jesus at the center.