The soul of man is divided into three parts, intelligence, reason, and passion. Intelligence and passion are possessed by other animals, but reason by man alone.

Τὴν δ᾽ ἀνθρώπου ψυχὴν διαιρεῖσθαι τριχῆ, εἴς τε νοῦν καὶ φρένας καὶ θυμόν.

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Original Citation

Pythagoras. Quoted in The Lives and Opinions of Eminent Philosophers, written by Diogenes Laërtius. c. 240 AD, bk. 8, ch. 1, sect. 30.

Current Citation

Pythagoras. Quoted in The Lives of Eminent Philosophers, written by Diogenes Laërtius, translated by Pamela Mensch, edited by James Miller. Oxford University Press, 2018, bk. 8, ch. 1, sect. 30.