Philosophers and Authors
- Abraham Maslow
- Adam Smith
- Al-Farabi
- Al-Ghazali
- Alexis de Tocqueville
- Alfred Adler
- Anton Chekhov
- Aristotle
- Arthur Schopenhauer
- Augustine of Hippo
- Averroes
- Avicenna
- Baruch Spinoza
- Benjamin Franklin
- Bertrand Russell
- Blaise Pascal
- Boethius
- Carl Jung
- Charles Dickens
- Cicero
- Daniel Kahneman
- Dante Alighieri
- David Hume
- Diogenes of Sinope
- Edmund Burke
- Emily Dickinson
- Epictetus
- Epicurus
- Erich Fromm
- Francis Bacon
- Friedrich Nietzsche
- Fyodor Dostoevsky
- Georg Wilhelm Friedrich Hegel
- George Bernard Shaw
- George Eliot
- George Washington
- Gottfried Wilhelm Leibniz
- Henry David Thoreau
- Heraclitus
- Immanuel Kant
- Jean-Jacques Rousseau
- Jeremy Bentham
- Johann Wolfgang von Goethe
- John Locke
- John Stuart Mill
- Karl Marx
- Karl Popper
- Leo Tolstoy
- Ludwig Wittgenstein
- Mahatma Gandhi
- Maimonides
- Marcus Aurelius
- Mark Twain
- Mary Wollstonecraft
- Michel de Montaigne
- Miguel de Cervantes
- Muhammad
- Niccolò Machiavelli
- Plato
- Plotinus
- Plutarch
- Pythagoras
- Ralph Waldo Emerson
- René Descartes
- Robert Louis Stevenson
- Seneca
- Socrates
- Søren Kierkegaard
- Thomas Aquinas
- Thomas Hobbes
- Thomas Paine
- Victor Hugo
- Viktor Frankl
- Walt Whitman
- William James
- William Shakespeare