Light in the HeavensHumanitarian lessons and practical insights from the prophet of Islam The words of Muhammad, messenger of God and prophet of Islam, have a special place in the hearts of his followers. Wielding an authority second only to the Qur'an, they are cited by scholars in a vast array of disciplinesincluding law, theology, metaphysics, poetry, grammar, history, and medicineand are quoted by Muslims to one another in their daily lives. Light in the Heavens by