Book excerpt: Self-knowledge: Why it matters to transform ourselves. What makes us who we are? Is it our intelligence, talent, or something else in life? Not as much as we think. Abhaya Tiwari argues - our vision of life is fogged by superficiality. It yearns granularity about our core constituents of self by plowing deeper into our inner self. Self–knowledge plays a critical role in accessing our true self that plays a far greater role in our understanding of our true self, purpose, success and happiness, untangling us from the vicissitudes of life. It matters even more in a disrupted world that is fragmented in our contemporary times, where self-knowledge and its application provide a distinctive edge for exponential growth. Self-knowledge is critical for self-transformation. It provides deeper understanding of self, viz; what it is and what it does, how it regulates and provides common-sense wisdom for its practical application in life. It provides much needed clarity about our true self, evaluation of world around our self, our purpose and competencies requiring mastery to achieve self-transformation. This book will also touch upon deeper understanding of neuropsychology of self and its true nature for high performance and happiness giving insights into human nature and its behavior. Abhaya Tiwari provides insights and guidance to parents, students, teachers, and working professionals to achieve what we set out to be in life and to be content and happy.