“Who will guard the guards ? If we're the guards of society, then who will watch us and make sure that we're not dangerous?”
“Who will guard us against the guardians?”
“Nisi Dominus custodierit domum, in vanum vigilant qui custodiunt eam," Unless the Lord guard the house, in vain do they watch who guard it.”
“Quis custodiet ipsos custodes? Who will guard the guards?”
“Jesse said, "You know what we are, Tim? We're nighthawks. We're the ones who go out at night and guard everything so people can sleep in peace. We've got our eyes peeled; no one's going to slip anything past us.”