Sun Tzu
Daniel Sandoval
Sarah Davids
Niccolò Machiavelli
Plato
Jorge
Various Authors
Karl Marx
Friedrich Wilhelm Nietzsche
William Morgan
William Walker Atkinson
Emperor of Rome Marcus Aurelius
Henry David Thoreau
Rebecca Dotlich
William Richards
J. D. Riley
Alex Altman
Beau Norton
Aristotle
Gary Chapman
Ralph Waldo Emerson
Geshe Kelsang Gyatso
William Irwin
Jordan Hollis
Justin Halpern
Dr. Dan Ariely
Jaycee Dugard
Mitchell Zuckoff
Dennis Becker
Paul Kalanithi