“There is a parallel between what you feel during a top-class rugby match and what an artist feels on stage – and it’s not just the roar of the crowd. The people who are watching influence how you behave: they were viewing Kaufmann and driving him forward, just as they used to inspire me. I could empathise with Kaufmann’s total concentration on the performance, and the way he had to become one with the orchestra, who gave him the power to go beyond the norm.”