"In the ancient world there was no banking system as we know it today, and no paper money. All money was made from metal, heated until liquid, poured into moulds and allowed to cool. When the coins were cooled, it was necessary to smooth off the uneven edges. The coins were comparatively soft, and of course many people shaved them closely. In one century, more than eighty laws were passed in Athens to stop the practice of whittling down the coins then in circulation. But some money-changers were men of integrity, who would accept no counterfeit money; they were men of honour who put only genuine, full-weight money into circulation. Such men were called dokimos, and this word is used here for the Christian as he is to be seen by the world." (Donald Grey Barnhouse, Romans: God's Glory, p. 18.)