Lucretius does not enforce his moral teaching on the systematic plan on which his physical philosophy is discussed. His view of human life is sometimes presented as it arises in the regular course of the argument, at other times in highly finished digressions, interspersed throughout the work with the view apparently of breaking its severe monotony. These passages might be compared to the lyrical odes in a Greek drama. They afford relief to the strained attention, and suggest the close and permanent human interest involved in what is apparently special, abstract, and remote. There is no necessary connexion between the atomic theory of philosophy, and that view of the end and objects of life which Lucretius derived from Epicurus. Although the moral attitude of Epicurus was, in some respects, anticipated by Democritus, Epicureanism really started from independent sources, viz., from the later development of the ethical teaching of Socrates, and from the personal circumstances and disposition of Epicurus. By the ordinary Epicurean his philosophy was valued chiefly as affording a basis for the denial of the doctrines of Divine Providence and of the immortality of the soul. But there is a wide difference between ordinary Epicureanism and that solemn view of human life which was revealed to the world in the poem of Lucretius. The power which his speculative philosophy exercised over his mind was one cause of this difference. Although there is no necessary connexion between his philosophical convictions and his ethical doctrines, yet the elevation of feeling which he has imparted to the least elevated of all the moral systems of antiquity may be in part accounted for by the influence of ideas derived from the philosophy of Democritus.