The creative power of imagination which gives new life to words and thoughts is also present in many vivid and picturesque expressions, either scattered through the main argument, or shining in brilliant combinations in the more elaborate parts of the work. By this more imaginative use of language, the poet can illustrate his ideas by subtle analogies, or embody them in visible symbols, or endow the objects he describes with the personal attributes of will and energy. Thus, for instance, the penetrating subtlety of the mind in exploring the secrets of Nature becomes a visible force in the curious felicity of the expression (i. 408), 'caecasque latebras insinuare omnis.' The freedom and boundless range of the imagination is suggested with picturesque effect in the familiar expression—

Avia Pieridum peragro loca nullius ante

Trita solo[26];

while the calm serenity of the contemplative mind is symbolised in such figurative expressions as 'sapientum templa serena'; 'humanum in pectus templaque mentis'; and the stormy tumult of the passions and the perilous errors of life become vividly present to the imagination by means of the analogies pictured in the lines—

Volvere curarum tristis in pectore fluctus[27],

and

Errare atque viam palantis quaerere vitae[28].

What life and energy again are imparted to external things and abstract conceptions by such expressions as these:—'flammai flore coorto'; 'avido complexu quem tenet aether'; 'caeli tegit impetus ingens'; 'circum tremere aethera signis'; 'semina quae magnum iaculando contulit omne'; 'vagos imbris tempestatesque volantes'; 'concussaeque cadunt urbes dubiaeque minantur'; 'simulacraque fessa fatisci'; 'sol lumine conserit arva'; 'lucida tela diei'; 'placidi pellacia ponti'; 'vivant labentes aetheris ignes'; 'leti sub dentibus ipsis'; 'leti praeclusa est ianua caelo,' etc.

A similar power of imagination is shown in his more elaborate use of analogies, in his symbolical representation of ideas, and in his power of painting scenes from Nature and from human life. Few great poets have been more sparing in the use of mere poetical ornament. The grandest imagery which he strikes out, and the finest pictures which he paints are immediately suggested by his subject. The earnestness of his speculative and practical purpose restrains all exuberance of fancy. Thus his imaginative analogies are more often latent in single expressions than drawn out at length. But the few which he has elaborated, 'stand out with the solidity of the finest sculpture[29],' to embody some deep or powerful thought for all time. They are suggested not by outward resemblance, but by an identity which the imagination discerns in the innermost meaning of the objects compared with one another. The strong emotion attending on the presence of some great thought calls up before the inward eye some scene or action, which, if actually witnessed, would produce a similar effect upon the mind. Thus the thought of the chaotic confusion which the universe would present, on the supposition that the original atoms were limited in number, calls up the image of the most impressive and awful devastation, wrought by Nature upon the works of man.

Sed quasi naufragiis magnis multisque coortis