Lucretius' poem On the Nature of Things combines a scientific and philosophical treatise with some of the greatest poetry ever written.
With intense moral fervour, he demonstrates to humanity that in death there is nothing to fear since the soul is mortal, and the world and everything in it is governed by the mechanical laws of nature and not by gods; and by believing this men can live in peace of mind and happiness. He bases this on the atomic theory expounded by the Greek philosopher Epicurus and continues with an examination of sensation, sex, cosmology, meteorology, and geology.