Embark on a profound journey into the heart of mysticism and the perennial philosophy to uncover one of humanity's most enduring ideas: the divine spark. This deep dive into comparative religion and esotericism explores the concept of the "god within" as it appears across ancient wisdom traditions. From the Gnostic "imprisoned light" and Neoplatonic henosis, to the Hindu principle that Ātman is Brahman in Advaita Vedanta, the Sufi's path of annihilation in the Beloved, the Kabbalistic duty of Tikkun Olam, and the Buddhist doctrine of Buddha-Nature, we trace a universal map. This spiritual quest for self-realization, echoed in Carl Jung's modern psychology of individuation, offers a timeless blueprint for awakening and connecting with the ultimate ground of being.