Quote from a Graham Cooke interview:
In terms of ministry, we believe there are three titles that are clear in New Testament scripture. The first is that we're all supposed to be servants of the Lord. So we're training all of our people to be servants in the kingdom, servants in the house, and so on.
And then when you become a really excellent servant, you can get promoted to stewardship. And your stewardship is where you take responsibility for other people's lives. So you take responsibility to bring other people into what God has brought you into. You take responsibility for discipling, for mentoring, for assisting other people to grow and develop.
And when you become a really excellent steward, you get promoted to slavery. Because bondslave is the highest designation of ministry that exists in the kingdom of heaven.
(HT to Lutheran Renewal)
UPDATE: To read the entire interview, follow link to Lutheran Renewal then click on "publications" (left side of page) then scroll down to July 2002 bulletin "An Interview with Graham Cooke" by Dan Siemens.