Friedrich Nietzsche
Alexander Pope
Proverbio judío
Alfred Adler
Martin Lutero
Jules Renard
Elbert Hubbard
Refrán
Anatole France
Robert Louis Stevenson
Blaise Pascal
Jean Cocteau
Aristóteles
Adolf Hitler
José Ingenieros
Pierre Corneille
William James
Ralph Waldo Emerson
Juan Luis Vives
Mark Twain
Prosper Mérimée
Otto von Bismark
Paul Joseph Goebbels
Václav Havel
Sófocles
Baltasar Gracián
Marguerite Yourcenar