Through caverns measureless to man
          Down to a sunless sea,

it is the language rather than the idea which fascinates.  Professor Walker, speaking of the most exquisitely harmonious lyric ever written in English, or perhaps in any other language,[31] says with great truth:  “The reader of Lycidas rises from it ready to grasp the ’two-handed engine’ and smite; though he may be doubtful what the engine is, and what is to be smitten.”

It may be observed, moreover, that one of the main difficulties to be encountered in translating some of the masterpieces of ancient literature arises from their exquisite simplicity.  Although the indulgence in glaring improprieties of language in the pursuit of novelty of thought was not altogether unknown to the ancients, and was, indeed, stigmatised by Longinus with the epithet of “corybantising,"[32] the full development of this pernicious practice has been reserved for the modern world.  Dryden made himself indirectly responsible for a good deal of bad poetry when he said that great wits were allied to madness.  The late Professor Butcher,[33] as also Lamb in his essay on “The Sanity of True Genius,” have both pointed out that genius and high ability are eminently sane.

In some respects it may be said that didactic poetry affords special facilities to the translator, inasmuch as it bears a more close relation to prose than verse of other descriptions.  Didactic poets, such as Lucretius and Pope, are almost forced by the inexorable necessities of their subjects to think in prose.  However much we may admire their verse, it is impossible not to perceive that, in dealing with subjects that require great precision of thought, they have felt themselves hampered by the necessities of metre and rhythm.  They may, indeed, resort to blank verse, which is a sort of half-way house between prose and rhyme, as was done by Mr. Leonard in his excellent translation of Empedocles, of which the following specimen may be given: 

    [Greek:  ouk estin pelasasthai en ophthalmoisin ephekton
    hemeterois e chersi labein, heper te megiste
    peithous anthropoisin hamaxitos eis phrena piptei.]

    We may not bring It near us with our eyes,
    We may not grasp It with our human hands. 
    With neither hands nor eyes, those highways twain,
    Whereby Belief drops into the minds of men.

But Dr. Symmons, one of the numerous translators of Virgil, said, with some truth, that the adoption of blank verse only involves “a laborious and doubtful struggle to escape from the fangs of prose."[34]

A good example of what can be done in this branch of literature is furnished by Dryden.  Lucretius[35] wrote: 

    Tu vero dubitabis et indignabere obire? 
    Mortua cui vita est prope iam vivo atque videnti,
    Qui somno partem maiorem conteris aevi,
    Et vigilans stertis nec somnia cernere cessas
    Sollicitamque geris cassa formidine mentem
    Nec reperire potes tibi quid sit saepe mali, cum
    Ebrius urgeris multis miser undique curis,
    Atque animi incerto fluitans errore vagaris.