1001Philosophers

Aristotle vs Heraclitus on Nature

Heraclitus holds that nature is ceaseless change governed by an underlying logos: all things flow, and the unity of the world is the unity of opposites in tension. Aristotle accepts that natural things change but insists that change is only intelligible against a background of persistent substance with its own form and characteristic activity. The Aristotelian analysis of nature is in significant measure designed to make Heraclitean flux conceptually manageable.

About this topic

Philosophy's reflection on nature ranges from Greek inquiries into the principles of physical change to contemporary debates about the human relation to the non-human world. Ancient and medieval philosophers asked what nature is in itself and whether it has purposes; early modern thinkers reconceived it as the law-governed object of experimental science; Romantic and post-Romantic philosophers reacted by recovering nature as the site of meaning and value. The quotes below span all of these moments.

For a side-by-side overview of the two philosophers more broadly, see the full Aristotle vs Heraclitus comparison. To browse philosophy more widely on this theme, see the Nature quotes hub.

Representative quotes on nature

Aristotle on nature

  • “All men by nature desire to know.”

    Metaphysics Book I, 980a.21 : Opening paragraph of Metaphysics | Variant: All men by nature desire knowledge. | The first sentence is in the Oxford Dictionary of Scientific Quotations (2005), 21:10

  • “Nature does not do anything in vain .”

    Wikiquote

  • “The science which has to do with nature clearly concerns itself for the most part with bodies and magnitudes and their properties and movements, but also with the principles of this sort of substance, as many as they may be.”

    On the Heavens Book I, pg. 1 ( 350 BCE )

  • Attributed to Aristotle:

    “Man is by nature a political animal.”

  • Attributed to Aristotle:

    “Nature does nothing in vain.”

Heraclitus on nature

  • “You cannot step into the same river twice.”

    ποταμῷ γὰρ οὐκ ἔστιν ἐμβῆναι δὶς τῷ αὐτῷ

  • “The way up and the way down are one and the same.”

    ὁδὸς ἄνω κάτω μία καὶ ὡυτή

  • Attributed to Heraclitus:

    “All things flow.”

  • Attributed to Heraclitus:

    “Nature loves to hide.”

  • Attributed to Heraclitus:

    “The fairest order in the world is a heap of random sweepings.”

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