Churchill uses rhetoric to advance his purpose by doing what's outlined in letter D: Churchill uses a metaphor that compares the newly formed United Nations to a temple, thereby strengthening his argument that the UN's mission to secure peace and maintain freedom is a moral and ethical one that must be supported.
Churchill uses a metaphor, since he doesn't make direct comparisons. He says: "We must make sure...that <em>it is a true temple of peace</em> in which the shields of many nations can some day be hung up..." He doesn't say: "that it is <em>like</em> a true temple of peace" Had he put it that way it would have been a <em>direct</em> comparison, and not a metaphor.
Churchill strengthens his argument that the UN's mission to secure peace and maintain freedom is a moral and ethical one that must be supported by using the metaphor above, and he makes it even stronger by using and contrasting different, opposing metaphors in addition to the one commented on in the paragraph above: "that it is a force for action, and not merely a frothing of words, that it is a true temple of peace in which the shields of many nations can some day be hung up, and not merely a cockpit in the Tower of Babel."
