Abdul Qadir Gilani was a wise man. 
Abdul Qadir Gilani was a famous teacher. 
Abdul Qadir Gilani was a great teacher and leader. 
Abdul Qadir Gilani was a very important scholar and leader in the Islamic faith. 
His life followed a path of deep study and quiet reflection. He first learned about Islamic law in his home region. In 1095, he moved to the city of Baghdad to continue his learning. He studied law under teachers like Abu Saeed Mubarak Makhzoomi and Ibn Aqil. He also studied hadith, which are records of the Prophet's teachings. After his studies, he spent twenty-five years in a desert retreat. He lived a life of wandering and being an ascetic. This means he lived very simply to focus on his spirit.
Gilani was born around 1077 or 1078 in a town called Na'if. This town was in the Gilan region of Persia. His name, al-Jilani, actually comes from this place of birth. Some older stories say he was born in Iraq, but most modern historians disagree. His family likely had Persian roots, and some say his father was nicknamed Jangi Dust. He eventually moved to Baghdad, where he lived for most of his life. In Baghdad, people sometimes called him ajami because he spoke Persian. 
As a teacher, Gilani was very busy and popular in Baghdad. He returned to the city in 1127 to start preaching to the public. In the mornings, he taught about the Quran and hadith. In the afternoons, he gave lectures on spiritual discipline. He was known as an effective preacher for people of many backgrounds. He even attracted followers who were Jewish or Christian. He also started a school called the Madrasa al-Qadiriyya. This school became a major center for learning in the region.
Gilani left behind many writings that people still read today. Some of his books include the Book of the Secret of Secrets and the Purification of Heart. He died in the year 1166 and was buried in Baghdad. His shrine faced some trouble when it was destroyed in 1508. However, the Ottoman sultan Suleiman the Magnificent built a new shrine over his grave in 1535. This shrine still stands in Baghdad today. People still observe his death anniversary every year on 11 Rabi' al-Thani.
Abdul Qadir Gilani was a prominent Hanbali scholar and a significant Sufi mystic leader. He is the namesake for the Qadiriyya, which is among the oldest Sufi orders in the Islamic world. Sufism focuses on the inner spiritual life and personal devotion. 

Gilani's origins are tied to the Gilan region of Persia, located south of the Caspian Sea. He was likely born there around 1077 or 1078 in the town of Na'if. His name, al-Jilani, is a nisba, which is a term denoting his place of origin. While some 15th-century historians claimed he was born in Iraq, modern historians generally favor the Persian origin. His family likely had Persian roots, as his father or grandfather was nicknamed Jangi Dust. When he lived in Baghdad, he was sometimes called ajami, meaning non-Arab, because he spoke Persian. 
His educational journey was extensive and shaped his later teaching career. In 1095, he moved to Baghdad to pursue advanced studies. He studied Hanbali jurisprudence, which is a specific school of Islamic law, under Abu Saeed Mubarak Makhzoomi and Ibn Aqil. He also studied hadith, the recorded traditions of the Prophet, with Abu Muhammad Ja'far al-Sarraj. For his spiritual training, he followed the guidance of Abu'l-Khair Hammad al-Dabbas. After completing his formal education, Gilani spent twenty-five years in an ascetic retreat. During this time, he wandered the deserts of Iraq to focus on spiritual devotion.
Gilani was unique in how he approached Islamic jurisprudence, or fiqh. Although he adhered to the Hanbali school, he treated the Shafi'i school with equal respect. He was known to issue fatwas, which are legal rulings, according to both schools. The scholar Al-Nawawi praised him for this inclusive and dignified approach in the book Bustan al-'Arifin. 
In 1127, Gilani returned to Baghdad to begin a period of public preaching. He joined the teaching staff of his former teacher, al-Makhzoomi, and quickly became a popular figure. His daily schedule was structured to provide both legal and spiritual guidance. In the mornings, he taught Hadith and Tafsir, which is the interpretation of the Quran. In the afternoons, he delivered lectures on ilm al-Qulub, or spiritual discipline. His preaching was so effective that it attracted followers from diverse backgrounds, including Jews and Christians.
To support his growing community, Gilani established the Madrasa al-Qadiriyya in Baghdad. This institution served as a major center for Islamic learning and spirituality. It provided instruction in several disciplines, including the Quran, Hadith, Fiqh, and Tasawwuf, which is the study of Sufism. His influence extended beyond students to powerful political and military leaders. Notable figures such as Nur ad-Din Zangi and Salahuddin Ayyubi reportedly respected his spiritual guidance. Hagiographical sources suggest his emphasis on ethical conduct and inner purification led many to convert to Islam.
Gilani's intellectual legacy survives through many written works. Some of his notable books include Kitab Sirr al-Asrar wa Mazhar al-Anwar and Jila' al-Khatir. Other important titles include Futuh al ghaib and Al-Ghunya. He also wrote the collection known as the Fifteen Letters. 
Gilani died in 1166 and was buried in Baghdad. His resting place has a complex history of preservation and rebuilding. In 1508, during the reign of the Safavid Shah Ismail I, his shrine was destroyed. However, the Ottoman sultan Suleiman the Magnificent commissioned a new shrine over the grave in 1535. This structure remains in existence today.
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