This course focuses on the tazkiyah (purification) of the soul by addressing inner diseases such as jealousy, pride, anger, hypocrisy, and arrogance. Students will explore how these inner sins affect the heart, harm relationships, and weaken the connection with Allah. Through Qur’anic verses, Hadith, and reflections from scholars, the course provides guidance on how to cleanse the soul, develop sincerity (ikhlas), humility, and love for others. A powerful spiritual journey for anyone seeking self-reform and closeness to Allah.