I have to say that when you tour the world obviously the jetlags and different hours and ways of living and traveling a lot of hours in the plane and you wake up in the morning and you're not quite sure where you are and it is very tiring.
I think a major element of jetlag is psychological. Nobody ever tells me what time it is at home.
It is the mark of a great man that he puts to flight all ordinary calculations. He is at once sublime and touching childlike and of the race of giants.