" A comprehensive treatment plan for the heart’s diseases is to deny the self of its desires,        Enjoin hunger, keep worship vigilance in the night, be silent, and meditate in private;        Also keep company with good people who possess sincerity, those who are emulated in their states and statements;        And, finally, take refuge in the One unto whom all affairs return. That is the most beneficial treatment for all of the previous diseases.        This must be to the point in which you are like a man drowning or someone lost in a barren desert and see no source of succor        Except from the Guardian, possessor of the greatest power. He is the One who responds to the call of the distressed. "

― , Purification of the Heart: Signs, Symptoms and Cures of the Spiritual Diseases of the Heart