Book 9
Chapter 6. LEUCIPPUSWith the account of Leucippus and Democritus Diels (op. cit. p. 142) compares Hippolytus, Ref. Haeres. i. 12. 1-2 and i. 13. 1; Aëtius i. 3. 15, i. 18. 3, ii. 1. 4, ii. 2. 2, ii. 7. 2, i. 3. 16; ultimately from Theophrastus, Phys. Opin. Fr. 8.
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Leucippus was born at Elea, but some say at Abdera and others at Miletus. He was a pupil of Zeno. His views were these. The sum of things is unlimited, and they all change into one another. The All includes the empty as well as the full. The worlds are formed when atoms fall into the void and are entangled with one another; and from their motion as they increase in bulk arises the substance of the stars. The sun revolves in a larger circle round the moon. The earth rides steadily, being whirled about the centre; its shape is like that of a drum. Leucippus was the first to set up atoms as first principles. Such is a general summary of his views; on particular points they are as follows.
