“Write what you know.”
“Stop writing what you know and start writing what you want to know.”
“You don't write what you know you write to find out what you don't know”
“Don't Write What You Know; Write What You Care About -- Passionately!!”
“Write what you know will always be excellent advice for those who ought not to write at all. Write what you think, what you imagine, what you suspect!”
“Write about what you don't know about what you know.”