Ralph Waldo Emerson, Søren Kierkegaard, Friedrich Nietzsche, Arthur Schopenhauer, Henry David Thoreau

Ralph Waldo Emerson, Henry David Thoreau, Mark Twain

Cicero, Confucius, Alexis de Tocqueville, Karl Marx, Henry David Thoreau, Friedrich Nietzsche

Beaumarchais, Nicolas de Chamfort, Georg Christoph Lichtenberg, Denis Diderot, Henry David Thoreau, Ralph Waldo Emerson, Søren Kierkegaard, Montesquieu, Voltaire, Oscar Wilde, Charles de Gaulle, Abraham Lincoln, Winston Churchill, Napoleon Bonaparte, Antoine de Saint-Exupéry, Anne Frank, Jane Austen, Marcel Proust, William Shakespeare, Martin Luther King, Marcus Aurelius, Mahatma Gandhi, Leonardo da Vinci, Lao Zi, Buddha, Immanuel Kant, Friedrich Nietzsche, Socrates, Confucius, Cicero, Fyodor Dostoevsky, Arthur Schopenhauer, Baruch Spinoza, – Plato, Albert Einstein