What is the author's purpose of this paragraph in the address? Today, the entire world is looking to America for enlightened leadership to peace and progress. Such a leadership requires vision, courage and tolerance. It can be provided only by a united nation deeply devoted to the highest ideals. With great humility I call upon all Americans to help me keep our nation united in defense of those ideals which have been so eloquently proclaimed by Franklin Roosevelt. I want in turn to assure my fellow Americans and all of those who love peace and liberty throughout the world that I will support and defend those ideals with all my strength and all my heart. That is my duty and I shall not shirk it.