This is the fourth book in the series by Dr. Assad Nimer Busool, meant for students at the high school level. Apart from containing lessons based on the teachings and the guidance of the Quran and the Sunnah of the Prophet Muhammad, it covers a wide spectrum of topics in Islam and its history. In this book, the lessons on Islamic principles are dealt with in greater detail and the impact of these principles on the lives of the Muslims in all generations specially the first generation.