Edwin A. Abbott / Aristotle / Dale Carnegie / Gilbert Keith Chesterton / René Descartes / Epictetus / Marcus Aurelius Antoninus / Sigmund Freud / Hermann Hesse / David Hume / Lao Tzu / Confucius / Swami Abhedananda / David Herbert Lawrence / Niccolò Machiavelli / Benedictus de Spinoza / John Mill / Prentice Mulford / Thomas More / Friedrich Nietzsche / J. Allanson Picton / Plato / Sun Tzu / Vatsyayana / Voltaire / H. G. Wells / Frances Bacon | 