In this book an attempt has been made to present the fundamentals of Sufism, Vedanta Guru Granth Saheb, Hinduism, Theosophy and Principles of Philosophy to enable the readers to grasp the underlying principles in them and find answers to the questions plaguing the modern mind. It is hoped that this book will enable simple peace loving people to dispel some of the doubts in their minds on the problems pertaining to the religious practices and precepts in India.