Anyone who speaks a word against the Son of Man, it will be forgiven him; but whoever speaks against the Holy Spirit, it will not be forgiven him, either in this age or the age to come. (Matt. 12:32 What is the sin of Blasphemy? In 1 Timothy 1:12-13 Paul says that he was a blasphemer, but he received mercy because he did it ignorantly in unbellief. Three of the four gospels mention Christ warning that the sin of blasphemy against the Holy Spirit will not be forgiven. Mark says that the blasphemer is in danger of "eternal damnation."