-In the Stanley Kubrick's Movie Shining(1980) the "Forbidden" Room is 237,

23 and 7  ,

opposite to the book where it is 217 .

>Jack is surrounded by mirrors in almost all internal Hotel scenes ,

He knew since the beginning , the "Orders from the House" ,

the sacrifice was premeditated somehow ,

He just got help to remember his eternal "duty" ,

Do not Offend holy places such as an indian cemetery . 

A Link to a Shining synopsis HERE .