This book is all about how to live a long, happy and healthy life. The title of this book itself vividly tells the content and purpose of this book. God has created this body to last for 100 years or so, but owing to lack of knowledge of the internal system of the body, and because of unmindfully led modern life, the span of life is reduced to barely 50 years. Ancient Indian rishis had very deeply studied the body and mind and their relation...