Maintaining his mental sharpness is a priority for the legendary boss, who shared that he regularly completes quizzes to keep his memory active. He also recalled the terrifying experience of suffering a brain haemorrhage that needed emergency surgery. He detailed the difficult rehabilitation process in a recent interview with BBC Breakfast.
"I had lost my voice; I couldn't speak. That was a frightening moment. I remember my grandsons coming to see me and I had lost my voice. Then they brought in a therapist and she started doing things like asking me to write down the names of birds, names of animals, names of rivers. That way my voice came back," he said.