Fethullah Gülen's Works 
Key Concepts in the Practice of Sufism-2
Key Concepts in the Practice of Sufism-2
This book is the second volume of the Emerald Hills of the Heart series, which brings out a comprehensive and unique examination of concepts and terms associated with sufism in Islam. In this volume, Gulen looks at fifty different concepts. With an introduction on the heart and some of its dynamics, this work is a rich addition with more gates into spirituality. Concepts examined include freedom, altruism, wisdom, sainthood, intoxication and sobriety, wakefullness and the universal man..