Present Time Quotes
L. Ron Hubbard (2007). “Handbook for Preclears”, p.103, Bridge Publications, Inc.
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.41, Lulu.com
John Dewey (1998). “Experience and Education, 60th Anniversary Edition”, p.51, Kappa Delta Pi