God describes the faith that God gave to humankind as a light upon humanity. The faith of our father Abraham, and of all the prophets, one prophet after another, until the final articulation of this faith with the Prophet Muhammad, is a light upon humanity. What does light do? It forces darkness to retreat. When it shines, it enables visibility and clarity, it exposes the hidden and secret, and confronts those who look where the light shines to see the true nature of things. Light, by its...