Shaikh Abul-Hassan Kharaqani Aboul was an enlightened Iranian learned man and one of the master Sufis of Islam who lived in the 11 century.

To him every sect, religion & faith has an equal value. He respects all faiths & religions on an equal base. In other words he meant at the house of Aboul Hassan, none is distinguished by their color of skin or their race.

Kharaghani had this message at the entrance of his house:

"Whoever enters my place, feed them without asking about their faiths. Because if they were favor by God almighty who saw them worthy of the gift of life, then they are certainly worthy of being fed at the house of Aboul Hassan". 

He was born in 963 CE from Persian parents in Khorasan in a village called Kharaqan (today located in Semnan province of Iran, near Bustam) and died on the day of Ashura (10th of Muharram) in 1033 CE.

He was the disciple of Shaikh Abul-Abbas Qassab Amili in tariqah but had deep spiritual relation with Bayazid Bastami, a well-known Sufi Master who died almost a century before him but had spoken about the personality and state of Abul Hassan Kharaqani.

Farid al-Din Attar, a famous Persian poet and sufi, devoted a large part of his book Tadhkiratul-Awliya (Biography of the Saints) about the personality, state and stories of Abul Hassan Kharaqani. Attar has called him as Sultan-e Salateen-e Mashayekh (The King of the kings of Sufi Masters), Ocean of the spiritual knowledge, Sun of the Lord, Mystery of the Lord and focus of attention of his people.

Abul Hassan Kharaqani was the Master or Shaikh of the famous Persian Sufi and poet, Khwajah Abdullah Ansari. Avicenna (Ibn Sina), Shah Mahmood of Ghazna, Abu-Said Abul-Khair and Nasir Khusraw had traveled to Kharaqan to meet him and expressed their deep admiring feelings and respect for him.

Mewlana Jalal ad-Din Muhammad Balkhi (Rumi), Farid al-Din Attar, Khwajah Abdullah Ansari, Jami and others have narrated many poems about Shaikh Abul Hassan and have reported his several stories.

He was illiterate but had wide inspirational knowledge about the Quran and Hadith; his sayings and speeches are significantly magnificent due to their philosophical views. 

The book Noorul-Uloom (The light of Sciences) is dedicated to Shaikh Abul Hassan Kharaqani. It is believed to have been written by his disciples (murids) after his death. Its single manuscript copy is currently held in the British Museum.