In a tone and manner ranging from irony to rage, Juvenal criticizes the actions and beliefs of many of his contemporaries, providing insight into value systems and questions of morality as opposed to the realities of Roman life.

Jachmann (1943) argued that up to one-third of what survives is non-authentic: Ulrick Knoche (1950) deleted about hundred lines, Clausen about forty, Courtney (1975) a similar number.

[4] In recent times debate has focused on the authenticity of the "O Passage" of Satire VI, 36 lines (34 of which are continuous) discovered by E. O. Winstedt in an 11th-century manuscript in Oxford's Bodleian Library.

Ever since Housman translated and emended the "O Passage" there has been considerable controversy over whether the fragment is in fact a forgery: the field is currently split between those (Green, Ferguson, Courtney) who believe it is not, and those (Willis, Anderson), who believe it is.

[4] Juvenal is credited with sixteen known poems divided among five books; all are in the Roman genre of satire, which, at its most basic in the time of the author, comprised a wide-ranging discussion of society and social mores in dactylic hexameter.

ex quo Deucalion nimbis tollentibus aequor nauigio montem ascendit sortesque poposcit paulatimque anima caluerunt mollia saxa et maribus nudas ostendit Pyrrha puellas, quidquid agunt homines, uotum, timor, ira, uoluptas, gaudia, discursus, nostri farrago libelli est.

Back from when Deucalion climbed a mountain in a boat as the clouds lifted the waters, and then asked for an oracle, and then little by little spirit warmed the soft stones and Pyrrha showed naked girls to their husbands, whatever men do—prayer, fear, rage, pleasure, joy, running about—is the gist of my little book.

[8] Juvenal's Satires, giving several accounts of Jewish life in first-century Rome, have been regarded by scholars, such as J. Juster and, more recently, Peter Nahon, as a valuable source about early Judaism.

[12] In his autobiography, the German writer Heinrich Böll notes that in the high school he attended when growing up under Nazi rule, an anti-Nazi teacher paid special attention to Juvenal: "Mr. Bauer realized how topical Juvenal was, how he dealt at length with such phenomena as arbitrary government, tyranny, corruption, the degradation of public morals, the decline of the Republican ideal and the terrorizing acts of the Praetorian Guards.