 Although Empedocles gives an account of the cosmos, cosmology is not his sole interest. Both fragments and testimonia show his keen attention to questions about perception and its role in knowledge, the workings of the body, and psychology. Like the Pythagoreans, Empedocles thought that how one lived was as important as one’s theoretical commitments (and that the two were intimately connected). The ancient evidence seems to suggest that Empedocles was the author of two works, commonly called in modern scholarship the Physics and the Purifications, one cosmological and the other ethico-religious. The relation between the two works has been a matter of some controversy. In the 1990s important new evidence from the Strasbourg Papyrus showed unequivocally that the cosmological and ethico-religious aspects of Empedocles’ thought are inextricably intertwined (Martin and Primavesi 1999, Primavesi 2008, Kingsley 1995), although commentators still disagree about whether this new evidence supports the conclusion that there was a single poem combining  both.[9]  The correct philosophical understanding of the physical world and the correct way to live cannot be separated from one another in Empedocles’ thought (a similar attitude appears in Heraclitus); one cannot fully understand the world without living  correctly.[10]  Like the Pythagorean, the Empedoclean way of life included dietary restrictions and a story of transmigrating daimōns who seem to have some kind of personal identity. (Marmodoro 2016 is a collection of recent work on Empedocles.)