This excellent book is translated from the original Arabic book by Sheikh Taqiuddin An Nabahani, an Islamic jurist, 'alim, writer and the founder of Hizb ut-Tahrir - the largest Islamic global political party under a single leadership. Intelligence, Thinking, the reality of thinking and the method to think have been subjects of great inquiry and debate among scholars and philosophers globally. However, various academicians have proposed different inconclusive theories, without anything concrete that clearly defines the Human mind, its reality and how it thinks. This book is a must read for all those people who wish to build a clear and decisive way of thinking. It is a must read for those who want to understand how people think and how to influence people and convince them about their viewpoint. It is a subject rarely written or spoken about and Nabahani has gone a far way in trying to explain the subject to the readers.