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Nature hath given men one tongue but two ears, that we may hear from others twice as much as we speak.

Marcus Aurelius, Epictetus, Lucius Annaeus Seneca (2015). “Stoic Six Pack: Meditations of Marcus Aurelius The Golden Sayings Fragments and Discourses of Epictetus Letters from a Stoic and The Enchiridion”, p.124, Lulu.com
Nature hath given men one tongue but two ears, that we may hear from others twice as much as we speak.