The name ―Pharisee,‖ according to the Judaist authorities, means ―one who separates himself,‖ or keeps away from persons or things impure in order to attain the degree of holiness and righteousness required in those who would commune with God. The Pharisees formed a league or brotherhood of their own, admitting to their inmost councils only those who, in the presence of three members, pledged themselves to the strict observance of Levitical purity. They were the earliest specialists in secret conspiracy, as a political science.

