Stealing is not only physically robbing another's possessions, but it is also taking advantage of other people. Luther was very concerned about unjust business practices, His comments particularly challenge us today, since we live in a culture built on a free-market economy and generally agree that nay price charged to people is morally acceptable. On the other hand, Luther points out how working people also steal from their employers by not giving a full day's work for a full day's pay. Though written over 475 years ago, Luther's comments on the Seventh Commandment are amazingly relevant and timely, and they point out the biblical distinction between the two kingdoms. For example, toward the end of the discussion on the Seventh Commandment in the Large Catechism, Luther wisely notes that the duty of the Church is to reprove sin and teach the Word of God. It is the duty of governing authorities to restrain lawlessness. The Church, as a spiritual institution, does not order society or enact societal laws; this is solely the duty of the government.