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.46, Enhanced Media Publishing
William Wordsworth (1837). “The Complete Poetical Works of William Wordsworth: Together with a Description of the Country of the Lakes in the North of England, Now First Published with His Works ...”, p.85
Winston Churchill's addree as Home Secretary to Prime Minister Asquith on compulsory sterilization of 'the feeble-minded and insane', as quoted in "'Race', Sport and British Society" edited by Ben Carrington and Ian Mcdonald, 2001.
Friedrich Schiller, Heinrich Du ntzer, Percy Pinkerton, Samuel Taylor Coleridge (1902). “The Maid of Oreleans; The Bride of Messina; Wilhelm Tell; Demetrius; The Piccolomini; The Death of Wallenstein; Wallenstein's Camp”