Epictetus, Marcus Aurelius, Lucius Annaeus Seneca (2016). “Stoic Six Pack: Meditations of Marcus Aurelius, Golden Sayings, Fragments and Discourses of Epictetus, Letters from a Stoic and The Enchiridion”, p.92, Enhanced Media Publishing
"Essential Ohsawa: From Food to Health, Happiness to Freedom - Understanding the Basics of Macrobiotics". Book edited by Carl Ferré and Herman Aihara, p. 77, 1994.