Purusha refers to the unmanifest spirit or pure consciousness that transcends individual identity and physical form. It embodies the eternal essence beyond the fluctuations of the material world, serving as the cosmic observer distinct from manifest reality. Realizing Purusha involves recognizing oneself beyond transient thoughts, emotions, and physical sensations, and identifying with the universal consciousness that underlies all existence. This concept is central to spiritual practices aiming for self-realization and inner liberation.