The Joys of reading Dan Brown

Just reading Digital Fortress and came across this line: "Quis custodiet ipsos custodes?" It is a Latin phrase, which means "Who will guard the guards?" - A common problem in Indian society, where the police seems to be committing more crimes than preventing.
Anyhow, the point is one can count on Dan Brown to bring in something like this, insightful, incisive and poignant!