An insight into the word ספר which is the שרש for many words including the word ספירות and its four insights: 1) מספר, Everything that is counted is limited, precise but has an absolute value לא בטל. 2) סיפור והגדה it reveals and tells the story of our purpose as Jews on this earth. 3) ספירות ובהירות The purpose the Jew has is illuminated with a great light. 4) ספר. This is the idea that the open book (of blank pages) is the true infinity in terms of possibilities. This then is the inner meaning of a holiday attached to ספרים.