The present book, written by Sivaramakinkar Yogatrayananda, offers his analysis of some of the key ideas of Indian philosophy in general. The topics that have been covered in the book include 1. The difference between ārya and anārya, 2. The importance of śāstra and its knowledge, 3. The nature of logic and 4. The nature of science and its classifications. The author also talks about the nature of the philosophy of mathematics.