This memorable collection of quotations is a treasure trove of insight and wisdom by ninety great philosophers of Western civilization, including Saint Thomas Aquinas, Hannah Arendt, Aristotle, Saint Augustine, Sir. Alfred J. Ayer, Francis Bacon, Simone de Beauvoir, Edmund Burke, Albert Camus, Cicero, John Dewey, Ralph Waldo Emerson, Friedrich Engels, Heraclitus, Thomas Hobbes, Eric Hoffer, Immanuel Kant, John Locke, Niccolo Machiavelli, John Stuart Mill, Lewis Mumford, Friedrich Nietzsche, Blaise Pascal, Plato, Jean-Jacques Rousseau, Bertrand Russell, George Santayana, Jean-Paul Sartre, Socrates, Benedict Spinoza, Henry David Thoreau, Alexis de Tocqueville, Voltaire, and Alfred North Whitehead.