Agreeably to the school to which he belonged, he relied on Reason and distrusted the Senses. From his fragments it has been inferred that he was sceptical of the guidance of the former as well as of the latter, founding his distrust on the imperfection the soul has contracted, and for which it has been condemned to existence in this world, and even to transmigration from body to body. Adopting the Eleatic doctrine that like can be only known by like, fire by fire, love by love, the recognition of the divine by man is sufficient proof that the Divine exists. His primary elements were four--Earth, Air, Fire, and Water; to these he added two principles, Love and Hate. The four elements he regarded as four gods, or divine eternal forces, since out of them all things are made. Love he regards as the creative power, the destroyer or modifier being Hate. It is obvious, therefore, that in him the strictly philosophical system of Xenophanes had degenerated into a mixed and mystical view, in which the physical, the metaphysical, and the moral were confounded together; and that, as the necessary consequence of such a state, the principles of knowledge were becoming unsettled, a suspicion arising that all philosophical systems were untrustworthy, and a general scepticism was already setting in. To this result also, in no small degree, the labours of Democritus of Abdera tended. He had had the advantages derived from wealth in the procurement of knowledge, for it is said that his father was rich enough to be able to entertain the Persian King Xerxes, who was so gratified thereby that he left several Magi and Chaldæans to complete the education of the youth. On his father's death, Democritus, dividing with his brothers the estate, took as his portion the share consisting of money, leaving to them the lands, that he might be better able to devote himself to travelling. He passed into Egypt, Ethiopia, Persia, and India, gathering knowledge from all those sources. [Sidenote: Democritus asserts the untrustworthiness of knowledge.]