Aeneid of Virgil were left unfinished by their authors, and given to the world in a more or less imperfect condition by other hands. The poem, though incomplete in regard to the arrangement of its materials and artistic finish, presents a full and clear view of the philosophy accepted and expounded by Lucretius. What, then, is the intellectual interest and value of the work, considered as a great argument, in which the plan of Nature is explained, and the position of man in relation to that plan is determined? Is it true, as an illustrious modern critic[392] has said, that 'the greatest didactic poem in any language was written in defence of the silliest and meanest of all systems of natural and moral philosophy?' Is this work a mere maze of ingeniously woven error, enriched with a few brilliant colours which have not yet faded with the lapse of time? or is it a great monument of the ancient mind, marking indeed its limitations, but at the same time perpetuating the memory of its native strength and energy? Has all the meaning of this controversy between science in its infancy and the pagan mythology in its decrepitude passed away, as from the vantage-ground of nineteen centuries the blindness and the ignorance of both combatants are apparent? Or, may we not rather discern that amid all the confusion of this dim νυκτομαχία a great cause was at issue; that truths the most vital to human wellbeing were involved on both sides; and that some positions were then gained which are not now abandoned?