What is the unpardonable sin?
Matthew 12:31 Therefore I say to you, any sin and blasphemy shall be forgiven men, but blasphemy against the Spirit shall not be forgiven.”
The unpardonable sin is the sin of rejection. The unpardonable sin is defined as blasphemy against the Holy Spirit, because when Christ was on earth, the religious leaders were attributing his miracles to demonic powers when in fact they were the product of the Holy Spirit working in the life of Christ (Matt. 12:12-32).