Almost every religion, spiritual practice, philosophy and person grapples with fear. The most repeated phrase in the Bible is "Be not afraid." The ancient Greeks spoke of phobos, panic and terror. It is natural to feel fear, the Stoics believed, but it cannot rule you. Courage, then, is the ability to rise above fear, to do what's right, to do what's needed, to do what is true. And so it rests at the heart of the works of Marcus Aurelius, Aristotle, and CS Lewis, alongside temperance, justice, and wisdom.