This thinker argued that contraries are co-present in objects, using the example of "the bow and the lyre," in his doctrine of Unity of Opposites.
This thinker attacked his predecessors by claiming that Homer should be beaten and that Pythagoras was a swindler. He held that thinking was common to all things, and a scholarly debate exists over whether or not he thought that the psyches of the best men were immortal. This thinker argued that contraries are co-present in objects, using the example of "the bow and the lyre," in his doctrine of Unity of Opposites. This man proposed that the world was driven by logos, and he argued for another doctrine that was at odds with the main theory of Parmenides. For 10 points, name this philosopher who argued that the world was in a state of eternal flux, claimed that fire was the basic element, and supposedly said that you cannot step into the same river twice.
This thinker attacked his predecessors by claiming that Homer should be beaten and that Pythagoras was a swindler.
 Heraclitus