And so I tell you, every kind of sin and slander can be forgiven, but blasphemy against the Spirit will not be forgiven.Readers often wonder what is meant by "Blasphemy against the Holy Spirit". Here's how Pope John Paul II explained it:
Blasphemy against the Holy Spirit, then, is the sin committed by the person who claims to have a 'right' to persist in evil - in any sin at all - and who thus rejects Redemption.
--John Paul II, 'Dominum et Vivificantem', May 18, 1986
