Two Quotes - Page 55
Mihaly Csikszentmihalyi (2001). “Flow: the psychology of optimal experience”
Larry Crabb (2009). “The Marriage Builder: A Blueprint for Couples and Counselors”, p.32, Harper Collins
Hans Urs von Balthasar (1993). “My Work: In Retrospect”, p.57, Ignatius Press
"Théodicée". Preface to the book by Gottfried Leibniz, 1710.
Eric Carle (2016). “The Very Hungry Caterpillar”, p.24, Penguin
Dion Fortune (2016). “Psychic self-defense: The Classic Instruction Manual for Protecting Yourself Against Paranormal Attack”, p.86, Dion Fortune
Derrick Jensen (2010). “Lives Less Valuable: A Novel”, p.200, PM Press
"On the Equilibrium of Planes". Treatise by Archimedes, Book 1, Propositions 6 & 7, The Law of the Lever,