This?
Quote Originally Posted by Stephen King, accepting the National Book Foundation Medal
The story and the people in it may be make believe but I need to ask myself over and over if I’ve told the truth about the way real people would behave in a similar situation…. We understand that fiction is a lie to begin with. To ignore the truth inside the lie is to sin against the craft, in general, and one’s own work in particular.
or on the dedication page of It?