Blasphemy against the Holy Spirit is any sin that a person clings to by continually resisting the convicting power of the Holy Spirit.
(Mark 3:22) "¶ And the scribes which came down from Jerusalem said, He hath Beelzebub, and by the prince of the devils casteth he out devils."
People can resist the conviction of the Holy Spirit for a time but once a person submits to the leading of the Holy Spirit all that former resistance is forgiven.. Blasphemy of the Holy Spirit is a sin that if once done will never have forgiveness in this world or the next..