One supposes a man such as him would be able to accept death with equanimity. This is backwards. As he was losing much more in death than most of us will; he was far more alive than most anyone has ever been.
Russell was 97. Feynman was 69 and was in treatment the last decade of his life. von Neumann went from diagnosis to dead in a little over a year. He was 53.
Kurt Gödel starved to death because of fear of dying poisoned.
In bad times, intelligence by itself is probably not enough to save us of our emotions.