I have a very firm schedule. I must wake up at six a.m. or I feel very guilty. I write from 6:30 to 10:30 six days a week, like a soldier—no interruptions. Then I read the newspapers and have a shower. I go to my clinic just beside my house from noon to three, then I have a nap because it's very hot during the afternoon here. From six to nine in the evening, I return to my clinic to work, and from nine to midnight, I read. For five or six days a week, I don't go out. My life is confined to my work, my family, my books, my writing.
National Geographic, September 2006
(Thanks to Zehra Sidika.)