Consciousness is one of the primitive philosophical concepts that all philosophers have aspired to understand and theorize about its ontology. Consciousness has been central to the philosophical discourse in all the classical Indian philosophical systems. Some have denied its ontology, and some have accepted and asserted in such a way that consciousness is considered real and all-pervasive. This assertion has not lost its value but rather unfolded in many ways in the contemporary academic discourses much beyond the theoretical realm of philosophy, it has been in discussion in science and society. Sāṃkhya-Yoga philosophy, being one of the primitive philosophical systems, has attracted the attention of many contemporary philosophers and scientists. In this chapter, I have tried to bring about some of the central themes concerning consciousness that are the focal point of study. The chapter is broadly divided into two sections. They are, my philosophical notes and reflections, and the other is about the chapter summaries. The first part has been classified into some subsections that include discussions on the metaphysics of consciousness, dualism, self-consciousness, creation, evolution, suffering, samādhi, and the normative aspects of yoga, whereas the second part systematically provides a brief outline of the chapters that are discussed here in this book. For a learner, taking notes is an important aspect of any systematic investigation. Thus, my title intends to cover two parts that are included here for a sympathetic reader—sahrudaya, who would always add to this introduction by bringing some critical reflections and positive suggestions to further unfold the discourse more systematically and suggestively.