I met [Lacan] again in his country house in Guitrancourt in August 1955, where he had invited Heidegger and his wife, Elfriede, Jean Beaufret and me to spend a few days. This was just before the seminar Heidegger gave at Cerisy-la-Salle, in Normandy, on What is Philosophy?, which Lacan did not attend.1 The discussion between the thinker and the psychoanalyst was a complete failure. They did not speak the same language, their approaches were entirely different.
...
Heidegger I met in the summer of 1955, when he was spending a few days in Paris, just before the meeting with Lacan and the conference in Cerisy. We subsequently met several times, in his house in Freiburg or his hut in the Black Forest. We discussed many things – the ʻpolitical questionʼ throughout.

Stuart Elden: This question of Heideggerʼs politics is still very present. What did Heidegger say about this? What do you think of this?

KA: The discussion of the political question with Heidegger never advanced very far. One must say, the political realm in general eluded him. He was a great thinker and a narrowminded petty bourgeois at the same time; he did not really understand what had happened and was happening on this level. In the discussions, he tried to exonerate himself, saying that he had committed a great error, that in the beginning National Socialism was not what it later became, that he had distanced himself from Nazism, and so on. All this was wholly insufficient. But despite the National Socialist enticement of Heidegger, his thought can absolutely not be reduced or limited to Nazism. It is an opening, but it remains covered by a shadow. This shadow cannot and must not be forgotten, but all reductive attempts to explain it fail entirely.

¶ 10:31 PM