20. wall … separation between … sanctuary and … profane—No longer shall the wall of partition be to separate the Jew and the Gentile (Eph 2:14), but to separate the sacred from the profane. The lowness of it renders it unfit for the purpose of defense (the object of the wall, Re 21:12). But its square form (as in the city, Re 21:16) is the emblem of the kingdom that cannot be shaken (Heb 12:28), resting on prophets and apostles, Jesus Christ being the chief corner-stone.