James Allen (2013). “As a Man Thinketh: The Secret Edition – Open Your Heart to the Real Power and Magic of Living Faith and Let the Heaven Be in You, Go Deep Inside Yourself and Back, Feel the Crazy and Divine Love and Live for Your Dreams”, p.25, Lulu Press, Inc
James Allen (2013). “As a Man Thinketh: The Book of Thoughts, Health and Body, Character, Purpose, Achievement, Visions and Ideals (New Thought Edition - Secret Library)”, p.24, Lulu Press, Inc