The United States has a tremendous responsibility to act according to the measure of our power for good in the world. We have learned that we must earn the peace we seek just as we earned victory in the war, not by wishful thinking but by realistic effort. At no time in our history has unity among our people been so vital as it is at the present time. Unity of purpose, unity of effort, and unity of spirit are essential to accomplish the task before us.

Special Message to the Congress on the Threat to the Freedom of Europe (1948)