“An expert is someone who knows some of the worst mistakes that can be made in his subject, and how to avoid them.”
“An expert is a person who has made all the mistakes that can be made in a very narrow field.”
“An expert is a man who has made all the mistakes which can be made in a very narrow field.”
“Some people make choices hoping for the best; Korsak had made a choice simply to avoid the worst.”
“You know that the best you can expect is to avoid the worst.”
“... if you're someone who knows the worst thing can happen at any time, aren't you also someone who knows the best thing can happen at any time too?”