The disciples of Thales and Pythagoras grant that all bodies are passible and divisible into infinity. Others hold that atoms and indivisible parts are there fixed, and admit not of a division into infinity. Aristotle, that all bodies are potentially but not actually divisible into infinity.
Complete Works of Plutarch — Volume 3: Essays and Miscellanies · The Wunder Library — complete classics, free to read, with narration.