Have you ever wondered: What self-purification (tazkiyat al-nafs/tasawwuf) means? What is the proof from the Quran and hadith in regard to it? It is an historic fact that Sufi spiritual leaders were responsible for the spread of Islam in the Indian subcontinent, Central and Southeast Asia, Central, North and South Africa, as well as some parts of Russia, Europe and America today. Where did the Sufis originate? What was the position of the Companions, Islamic schools of law and scholars of the Community in regard to self-purification? Read the evidence and then decide for yourself.