Heraclitus is critical of book-learning, yet, unlike Pythagoras, he wrote a book, which presumably he intended to be read. Heraclitus may think himself justified in composing his book because in his composition he remains true to the nature of things, which ‘loves to hide’ (B123). He writes a book that is just as taxing as the nature of things and demands the reader’s careful attention and thorough engagement. Like the Lord in Delphi, and the nature of things, Heraclitus ‘neither speaks out nor conceals, but gives a sign’ (B93). What is more important, he informs his readership about subjects that are not beyond their ability to verify, unlike the stories of the poets and the histores about the strange people and their curious customs and t...