Tazkiyatun Nafs (Purification of the Soul) by is widely considered a foundational manual for spiritual psychology in Islamic tradition. Rather than a single standalone book with this title, the concept is primarily derived from his magnum opus, Madarij al-Salikin (Stations of the Seekers), and other works like Ar-Ruh and Al-Wabil al-Sayyib . Core Themes & Concepts

A guide on protecting the heart from the traps of Satan and the whims of the ego. The Process of Purification

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The central goal of the text is to achieve a "sound heart" ( Qalbun Saleem ) by cleansing it of spiritual ailments.