Yet singers put the burden of a ship's rope on them. A little dust, a draft, too powerful breathing or a strained movement are enough to reduce all efforts to nought. This anguish that grasps him foremost on the other side of 40, when age switches on the blinkers. Pl cido Domingo knows that a time will come when he will need to think about this. His thirst for singing seems a challenge to time and stamina, but there will be a turning point.
Nobody can say.
Not even he. He probably dreads that morning when the voice won't be quite the same as it was the day before. That is why he is preparing for the future. Always in music. But in the pit, his back to the audience, facing musicians and singers.