Pope John Paul II, Dominum et Vivificantem, 6 Why is blasphemy against the Holy Spirit unforgivable? ...blasphemy against the Holy Spirit consists precisely in the radical refusal to accept this forgiveness,...
Plested 2004, pp. 16–27. Plested, Marcus (2004). The Macarian legacy: the place of Macarius-Symeon in the Eastern Christian tradition. Oxford Theological Monographs. Oxford New York: Oxford University Press. ISBN0-19-926779-0. OCLC56319750.