Juvenal
Anglicized as Juvenal, was a Roman satiric poet.
Orandum est ut sit mens sana in corpore sano.
Who watches the watchmen?
Dat veniam corvis, vexat censura columbas.
Nunc patimur longae pacis mala, saevior armis
luxuria incubuit victumque ulciscitur orbem.
Nil habet infelix paupertas durius in se,
quam quod ridiculos homines facit.
No one shall be a thief by my co-operation.
Nam qui dabat olim
imperium, fasces, legiones, omnia, nunc se
continet atque duas tantum res anxius optat,
panem et circenses.
Sed quis custodiet ipsos custodes?
Nobilitas sola est atque unica virtus.
Wretched poverty offers nothing harsher than this: it makes men ridiculous.
Haut facile emergunt quorum virtutibus opstat
res angusta domi.
Hic vivimus ambitiosa paupertate omnes.
Poena tamen praesens, cum tu deponis amictus
turgidus et crudum pavonem in balnea portas.
hinc subitae mortes atque intestata senectus;
it nova nec tristis per cunctas fabula cenas:
ducitur iratis plaudendum funus amicis.
Maxima debetur puero reverentia.
Summum crede nefas animam praeferre pudori
et propter vitam vivendi perdere causas.
Cantabit vacuus coram latrone viator.
The hardest thing to bear in poverty is the fact that it makes men ridiculous.
Nemo repente fuit turpissimus.
The original context is that a husband might lock his wife in the house to prevent her adulteries, but she is cunning and will start with the guards; hence, who guards the guards? The phrase has come to be applied broadly to people or organisations acting against dishonesty or corruption, esp. in public life. See Quis custodiet ipsos custodes? at Wikipedia.