Sufism, in Arabic taṣawwuf, grew from the asceticism and devotion of early Muslims into a rich tradition of teaching, poetry and communal practice. Sufis seek to realize tawḥīd, the oneness of God, not only as belief but as lived truth, through remembrance, discipline and love, under the guidance of a master within an order.
Sufism
Taṣawwuf: the inner, mystical dimension of Islam, the path of purifying the heart to know and love God.
Also: tasawwuf