As is now well known, Mother Teresa of Calcutta suffered severe spiritual afflictions through much of her remarkable life: "This terrible sense of loss – this untold darkness – this loneliness – this continual longing for God." These first emerged in 2001, but were only fully disclosed with the 2007 publication of her private writings and correspondence in Come Be My Light, edited by Fr Brian Kolodiejchuk MC, the postulator of her Cause.

In these, Teresa describes to her confessors and spiritual directors how over long periods, ultimately stretching to over 40 years with only fleeting respites: