Llewellyn Vaughan-Lee, Sufism: The Transformation of the Heart. The Golden Sufi Center, 1995.
God calls us with the irresistible attraction of love, which we experience as longing. In order to fully hear God’s call we have to allow ourself to be dissatisfied and unfulfilled, rather than trying to fill this painful vacuum with another distraction. We have to allow the pain of longing into our life. Longing is both the pain that burns away the veils of separation and the thread that guides us deeper and deeper within, until we are able to enter the innermost chamber of the heart where God is waiting.