|In Matthew 12:24-33 Christ points out that He can be blasphemed, and those who do such, can in the future be forgiven. "Whoever shall speak a word against the Son of Man, it shall be forgiven him; but whoever shall speak against the Holy Spirit, it shall not be forgiven him, either in this age or in the age to come" (v. 32).|
Christ's words are proven in the book of John. In 7:20, 8:48, and 8:52, the people said that He "had a demon." The Lord said nothing about their accusation. These people could have been forgiven if they repented. But the sin against the Holy Spirit could not be forgiven. The sin in Matthew 12 was that they claimed He was performing miracles by the power of Satan. They were seeing His objective miracles right before their eyes and claiming that Satan had performed those works. That was unforgivable. But to say He had a demon, or that He did certain works by the power of Satan, this could be forgiven. Christ said nothing with their accusations in the book of John.
(Listen to my teaching on the subject: Matthew 12, The Unpardonable Sin
God bless. – Dr. Mal Couch (5-10)