And they fortified Jerusalem unto the broad wall.
Nehemiah 3:8
"Cities well fortified have broad walls, 
and so had Jerusalem in her 
glory. 
The New Jerusalem must, in like manner, 
be surrounded and 
preserved 
by a broad wall of nonconformity to the world, 
and separation 
from its customs and spirit. 
The tendency of these days break down the 
holy barrier, 
and make the distinction between the church 
and the world 
merely nominal. 
  Professors are no longer strict and Puritanical, 
      questionable literature is read on all hands, 
          frivolous pastimes are 
currently indulged, 
              and a general laxity threatens to deprive the Lord's
 peculiar people of those sacred singularities which separate them from 
sinners.
 As friend met friend upon the city wall, 
The bulwarks of salvation thou hast a 
right to traverse, for thou art a freeman of the royal burgh, a citizen 
of the metropolis of the universe."
Charles Spurgeon 
 

