The doctrine of vocation, a term that is just the Latin word for “calling,” deals with how God works through human beings to bestow His gifts. God gives us this day our daily bread by means of the farmer, the baker, the cooks, and the lady at the check-out counter. He creates new life — the most amazing miracle of all — by means of mothers and fathers. He protects us by means of police officers, firemen, and our military. He creates beauty through artists. He heals by working through doctors, nurses, and others whom He has gifted, equipped, and called to the medical professions. He proclaims His Word, administers His sacraments, and cares for His sheep through the calling of pastors.
Luther called vocation a “mask of God.” He said that God milks the cows by means of the milkmaid. We see a menial worker and may even be so presumptuous to look down upon her, but behind that humble façade looms God Himself, providing milk for His children.
— Gene Edward Veith, in “Truth and Consequences”