This publication explores how Sufis approach their faith as Muslims, upholding an Islamic worldview, but going about making sense of their religion through the world in which they exist, often in unexpected ways. Using a phenomenological approach, the book examines Sufism as lived experience within the Muslim lifeworld, focusing on the Muslim experience of Islamic history. It draws on selected case studies ranging from classic Sufism to Sufism in the contemporary era mainly taken from biographical and hagiographical data, manuscript texts and treatises. In this way, it provides a revisionist approach to theories and methods on Sufism, and, more broadly, the category of mysticism.