Quamde gravis inter Graios qui vera requirunt.
The traditional opposition between Democritus and Heraclitus lived after them. Adherence to the doctrine of 'atoms and the void,' and to that of 'the pure fiery element,' became the symbol of a radical divergence in the whole view of human life.
While there is frequent allusion to the Stoics in the poem, there is no direct mention either of them or of their chief teachers, Zeno, Chrysippus, or Cleanthes. Neither do the greater names of Socrates, Plato, or Aristotle appear in it, though one or two passages clearly imply some familiarity with the writings of Plato[365]. But among the moral teachers of antiquity he acknowledges Epicurus only. The whole enthusiasm of his temperament breaks out in admiration of him. He alone is the true interpreter of Nature and conqueror of superstition (i. 75); the reformer 'who has made pure the human heart' (vi. 24); the 'guide out of the storms and darkness of life into calm and light' (iii. 1; v. 11, 12); the 'sun who at his rising extinguished all the lesser stars' (iii. 1044). He is to be ranked even as a God on account of his great services to man, in teaching him the mastery over his fears and passions:—
Deus ille fuit, deus, inclute Memmi.[366]
He speaks of his master throughout not only with the affection of a disciple, but with an emotion akin to religious ecstasy[367]. His admiration for him springs from a deeper source of spiritual sentiment than that of Ennius for Scipio, or of Virgil for Augustus. Though Epicurus inspired much affection in his lifetime, and though other great writers after Lucretius,—such as Seneca, Juvenal, and Lucian,—vindicate his name from the dishonour which the perversion of his doctrines brought upon it, yet even the most favourable criticism of his life and teaching must find it difficult to sympathise with the idolatry of Lucretius. Yet his error, if it be one, springs from a generous source. He attributes his own imaginative interest in Nature to a philosopher who examined the phenomena of the outward world merely to find a basis for the destruction of all religious belief. He saturates with his own deep human feeling a moral system which professes to secure human happiness by emptying life of its most sacred associations, most passionate longings, and profoundest affections.
There was a truer affinity of nature between Lucretius and another philosopher whom he names with the warmest feelings of love and veneration—Empedocles of Agrigentum—the most famous of the early physiological poets of Greece. He flourished during the fifth century B.C., and was the author of a didactic poem on Nature, of which some fragments still remain, sufficient to indicate the nature of the work and the character of the man. These fragments prove that Lucretius had carefully studied the older poem, and adopted it as his model in using a poetical form and diction to expound his philosophical system. He declares, indeed, his opposition to the doctrine of Empedocles, which traced the origin of all things to four original elements; but he adopted into his own system many both of his expressions and of his philosophical ideas. The line in which the Roman poet enunciates his first principle,—
Nullam rem e nilo gigni divinitus unquam,
was obviously taken from the lines of the old poem περὶ φύσεως—
ἐκ τοῦ γὰρ μὴ ἐόντος ἀμήχανόν ἐστι γενέσθαι
τό τ᾽ ἐὸν ἐξόλλυσθαι ἀνήνυστον καὶ ἄπρηκτον.