Kai Bird and Martin J. Sherwin, (2007), American Prometheus: The Triumph and Tragedy of J. Robert Oppenheimer, pages: 331–332, place: New York, publisher: Alfred A. Knopf (1st edition 2005)
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... at 10:30 a.m. on October 25, 1945, Oppenheimer was ushered into the Oval Office. President Truman was naturally curious to meet the celebrated physicist, whom he knew by reputation to be an eloquent and charismatic figure. ... At one point in their conversation, Truman suddenly asked him to guess when the Russians would develop their own atomic bomb. When Oppie replied that he did not know, Truman confidently said he knew the answer: "Never." For Oppenheimer, such foolishness was proof of Truman's limitations. The "incomprehension it showed just knocked the heart out of him," recalled Willie Higinbotham.

— Kai Bird

What It Means

This is a placeholder explanation generated by the low-overhead model. It interprets "... at 10:30 a.m. on October 25, 1945, Oppenheimer was ushered into the Oval Office. President Truman was naturally curious to meet the celebrated physicist, whom he knew by reputation to be an eloquent and charismatic figure. ... At one point in their conversation, Truman suddenly asked him to guess when the Russians would develop their own atomic bomb. When Oppie replied that he did not know, Truman confidently said he knew the answer: "Never." For Oppenheimer, such foolishness was proof of Truman's limitations. The "incomprehension it showed just knocked the heart out of him," recalled Willie Higinbotham." in the context of "Kai Bird and Martin J. Sherwin, (2007), American Prometheus: The Triumph and Tragedy of J. Robert Oppenheimer, pages: 331–332, place: New York, publisher: Alfred A. Knopf (1st edition 2005)" to mean that wisdom is timeless.

Source: Wikiquote: "Harry S. Truman" (Quotes about Truman) The 'What it means' explanation text was generated by Google Gemini Flash (accessed January 18, 2026). https://gemini.google.com/app
Harry S. Truman

About Harry S. Truman

Harry S. Truman (May 8, 1884 – December 26, 1972) was the 33rd president of the United States (1945–53), an American politician of the Democratic Party. He served as a United States senator from Missouri (1935–45) and briefly as vice president (1945) before he succeeded to the presidency on April 12, 1945 upon the death of Franklin D. Roosevelt. He was president during the final months of World War II, making the decision to drop the atomic bomb on Hiroshima and Nagasaki. Truman was elected in his own right in 1948. He presided over an uncertain domestic scene as America sought its path after the war, and tensions with the Soviet Union increased, marking the start of the Cold War.