‘Much of Kipling's phraseology is taken from the Bible, and no doubt in the second stanza he had in mind the text from Psalm CXXVII: ‘Except the lord build the house, they labour in vain that build it; except the Lord keep the city, the watchman waketh but in vain.’ It is not a text that makes much impression on the post-Hitler mind. No one, in our time, believes in any sanction greater than military power...’