“Nisi Dominus custodierit domum, in vanum vigilant qui custodiunt eam," Unless the Lord guard the house, in vain do they watch who guard it.”
“Unless the Lord builds the house, those who build it labor in vain. Unless the Lord builds the city, the guard keeps watch in vain.”
“Quis custodiet ipsos custodes? Who will guard the guards?”
“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?”
“Quis custodiet ipsos custodes.Which roughly translates asWho will Guard the Guardians, orWho watches the watchers.”