Ide madasar ring Heraclitus inggih punika logos, kata Yunani kuno sane madue macam arti; Heraclitus manawi nganggen arti kata sane malianan sareng penggunaan nyane ring bukune.
A fundamental idea in Heraclitus is logos, an ancient Greek word with a variety of meanings; Heraclitus might have used a different meaning of the word with each usage in his book.