What would you think if you learned that a school system was using the same science book it had been using for generations? And that same science book was the only book regarded as correct for every single grade - first through 12th. "Everything you need to know is in THIS book," their teachers said.
No other book on science was authorized and, in fact, any other science book was considered to be of no value. These other books could even destroy their understanding of real science.
They taught from this book for hundreds of years - reading it over and over again. They discussed its meaning, extrapolated, built lab programs and experiments based solely on information contained within those pages but added nothing. Through the years students and teachers learned that chapters were missing, pages were missing, words were missing but nothing was corrected.
While other schools of science grew and expanded, this school continued to cling to this one book as sacred and untouchable. As some revealed that the sacred science book was full of contradictions and tried to point out the parts that were right and the parts that were misguided or entirely missing, the sacred science school system grew angry and defensive.
For many years it was easy to convince those following the sacred science book that there was no other science. Students and teachers were isolated. Former students and teachers did not return. So current teachers and students heard little dissent. But outside of school, many technologies emerged that enabled current teachers and students to learn world teachings. Soon students and teachers could read and learn about other science knowledge.
Maybe the moral of this story is; "You can fool all of the people some of the time. You can fool some of the people all of the time. But you cannot fool all of the people, all of the time." And perhaps it can be added you can fool fewer in the course of time.
Sooner or later, the book has to be updated. If it's not updated, it will be replaced and deemed irrelevant. Those who insist the book is perfect, the teachings surrounding the book are perfect and refuse to grow, will become irrelevant.