St. Silouan the Athonite 1886-1938
If you do not feel pity for the sinner destined to suffer the pains of hell-fire, it means that the grace of the Holy Spirit is not in you, but an evil spirit. While you are still alive, therefore, strive by repentance to free yourself from this spirit. (Saint Silouan the Athonite, p. 352)
