Full Idea
The practices of Judaism developed during their Exile: circumcision, the Sabbath, the Passover (founding of the nation), Pentecost (giving of the laws), the Tabernacles, the New Year, and the Day of Atonement.
Gist of Idea
Judaism involves circumcision, Sabbath, Passover, Pentecost, Tabernacles, New Year, and Atonement
Source
Paul Johnson (The History of the Jews [1987], Pt II)
Book Reference
Johnson,Paul: 'A History of the Jews' [Phoenix 1993], p.83
A Reaction
These were the elements of ritual created to replace the existence of a physically located state. An astonishing achievement, not even remotely achieved by any other state that was driven off its lands. A culture is an idea, not a country.