"Lutherans have a special understanding of vocation. It's not limited to one's job but every single relationship I have, including parent, child, friend, neighbor, parishioner and citizen. It's any position in which I am the instrument through which God works in the world.
So, for instance, God heals us by giving us doctors and nurses. He feeds us by giving us farmers and bakers. He gives us earthly order through our governors and legislators, and he gives us life through our parents. God is providing all these gifts -- but we receive them from our neighbors.
Luther wrote that fathers should not complain when they have to rock a baby, change his diaper, or care for the baby's mother, but instead should view each act as a holy blessing. Everything we do in service to others is a holy blessing" (Mollie Hemingway, Credo: Mollie Hemingway, italics mine).
Ain't it the truth? ;-)