According to search-discovered classical Islamic scholarship, the concept of the Self (an-Nafs) is the cornerstone of Quranic psychology, representing the individual's psyche, ego, and consciousness. The Quran and scholars like Imam Al-Ghazali and Ibn Qayyim identify a dynamic spectrum of the Nafs, primarily categorized into three stages: an-Nafs al-Ammārah (the self inclined to evil, Quran 12:53), an-Nafs al-Lawwāmah (the self-reproaching conscience, Quran 75:2), and the ultimate goal, an-Nafs al-Muṭmaʾinnah (the tranquil self at peace, Quran 89:27). Linguistically derived from the root for 'breath', the Nafs is distinct from the Ruh (spirit); it is the seat of desires and the subject of personal accountability. The entire spiritual path, known as Tazkiyah al-Nafs (purification of the self), is the process of disciplining this self through worship and self-struggle (Jihad al-Nafs) to elevate it from its base state to one of contentment and submission to Allah. This comprehensive framework, synthesized from over 100 Quranic verses, establishes the Nafs not as a static entity but as the locus of a lifelong spiritual journey toward perfection.