US Presidency
1961

And others in earlier times have made the same dangerous mistake of assuming that the West was too selfish and too soft and too divided to resist invasions of freedom in other lands. Those who threaten to unleash the forces of war on a dispute over West Berlin should recall the words of the ancient philosopher: A man who causes fear can not be free from fear. We can not and will not permit the Communists to drive us out of Berlin, either gradually or by force. For the fulfillment of our pledge to that city is essential to the morale and security of Western Germany, to the unity of Western Europe, and to the faith of the entire Free World. Soviet strategy has long been aimed, not merely at Berlin, but at dividing and neutralizing all of Europe, forcing us back on our own shores.