Samuel Taylor Coleridge (1839). “Aids to reflection in the formation of a manly character on the several grounds of prudence, morality and religion”, p.72
Benjamin Franklin, William-Temple Franklin (1818). “Memoirs of the Life and Writings of (the Same), Continued to the Time of His Death by William Temple Franklin. - London, H. Colburn 1818”, p.253
Swami Vivekananda, Swami Adiswarananda (2006). “Vivekananda, World Teacher: His Teachings on the Spiritual Unity of Humankind”, p.146, SkyLight Paths Publishing
"Truth is a pathless land". Jiddu Krishnamurti's specch at the opening day of the annual Star Camp at Ommen, Holland, www.jkrishnamurti.org. August 3, 1929.