By Surindar Singh Kohli Dr. Surindar Singh Kohli, was professor and head of the department of Punjabi, Panjab University, Chandigarh. He Has not only made a significant contribution in the field of comparative religion in general and Sikh Studies in particular, through his works including, The Sikh Philosophy, Yoga of the Sikhs, Outlines of Sikh Thought, Philosophy of Guru Nanak Sikh Ethics, The Sword and the Spirit and The Conceptual Dictionary of Guru Granth Sahib. He is an authority on Sikh scriptures and has made their thorough and critical study in a dispassionate and scholarly manner. His works are marked by clarity, brevity and scholarship.