The _Agricola,_ perhaps the most beautiful piece of biography in ancient literature, stands on a much higher level than the _Germania,_ because here his heart was in the work. The rhetorical bent is now fully under control, while his mastery over "disposition" (to use the term of the schools), or what one might call the architectural quality of the book, could only have been gained by such large and deep study of the art of rhetoric as is inculcated by Quintilian. The _Agricola_ has the stateliness, the ordered movement, of a funeral oration; the peroration, as it might not unfairly be called, of the two concluding chapters, reaches the highest level of the grave Roman eloquence, and its language vibrates with a depth of feeling to which Lucretius and Virgil alone in their greatest passages offer a parallel in Latin. The sentence, with its subtle Virgilian echoes, in which he laments his own and his wife's absence from Agricola's death-bed--_omnia sine dubio, optime parentum, adsidente amantissima uxore superfuere honori tuo; paucioribus tamen lacrimis comploratus es, et novissima in luce desideraverunt aliquid oculi tui_--shows a new and strange power in Latin. It is still the ancient language, but it anticipates in its cadences the language of the Vulgate and of the statelier mediaeval prose.
Together with this remarkable power over new prose rhythms, Tacitus shows in the _Agricola_ the complete mastery of mordant and unforgettable phrase which makes his mature writing so unique. Into three or four ordinary words he can put more concentrated meaning than any other author. The likeness and contrast between these brief phrases of his and the "half-lines" of Virgil might repay a long study. They are alike in their simple language, which somehow or other is charged with the whole personality of the author; but the personality itself is in the sharpest antithesis. The Virgilian phrases, with their grave pity, are steeped in a golden softness that is just touched with a far-off trouble, a pathetic waver in the voice as if tears were not far below it. Those of Tacitus are charged with indignation instead of pity; "like a jewel hung in ghastly night," to use Shakespeare's memorable simile, or like the red and angry autumnal star in the _Iliad_, they quiver and burn. Phrases like the famous _ubi solitudinem faciunt pacem appellant_, or the _felix opportunitate mortis_, are the concentrated utterance of a great but deeply embittered mind.