The Mystics of Islam
by Reynold A. Nicholson
1914

The title of this book sufficiently explains why it is included in a Series 'exemplifying the adventures and labours of individual seekers or groups of seekers in quest of reality.' Sufism, the religious philosophy of Islam, is described in the oldest extant definition as 'the apprehension of divine realities,' and Mohammedan mystics are fond of calling themselves Ahl al-Haqq, 'the followers of the Real.' {Al-Haqq is the term generally used by Sufis when they refer to God.}

"Islam is a monotheistic Abrahamic religion originating with the teachings of Muhammad, a 7th century Arab religious and political figure. The word Islam means "submission", or the total surrender of oneself to God. An adherent of Islam is known as a Muslim, meaning "one who submits (to God)". There are approximately 1.61 billion Muslims, making Islam the second-largest religion in the world, after Christianity.