In Islamic thought, the concept of Nafs (self) and its purification is interpreted in several ways:

1. **Nafs al-Ammarah (The Commanding Self):** This aspect of the self inclines toward evil and desires, often leading to sinful behavior. It needs to be restrained and controlled through self-discipline and following Islamic teachings.

2. **Nafs al-Lawwamah (The Blaming Self):** This stage involves self-awareness and regret over one’s actions. It is a self that criticizes itself for mistakes and strives for improvement and repentance.

3. **Nafs al-Mutmainnah (The Tranquil Self):** This is the purified self, content and at peace with its faith and actions. It achieves inner peace through adherence to divine guidance and righteous living.

**Purification Methods:**

1. **Tazkiyah (Purification):** Involves cleansing the heart and soul through spiritual practices, repentance, and adherence to Islamic ethics.

2. **Dhikr (Remembrance of Allah):** Regular remembrance of Allah helps in strengthening faith and keeping the self aligned with divine guidance.

3. **Sincerity (Ikhlas):** Ensuring that all actions are done with sincere intentions for the sake of Allah.

4. **Repentance (Tawbah):** Seeking forgiveness for sins and making sincere efforts to avoid repeating them.

5. **Good Character and Conduct:** Practicing virtues such as honesty, patience, and humility to refine the self.

These interpretations and practices aim to elevate the self from its base desires to a state of spiritual fulfillment and peace.