https://www.nytimes.com/2023/11/29/us/henry-kissinger-dead.html
But before returning to the United States he visited Fürth, his hometown, and found that only 37 Jews remained. In a letter discovered by Niall Ferguson, his biographer, Mr. Kissinger wrote at 23 that his encounters with concentration camp survivors had taught him a key lesson about human nature.
“The intellectuals, the idealists, the men of high morals had no chance,” the letter said. The survivors he met “had learned that looking back meant sorrow, that sorrow was weakness, and weakness synonymous with death.”