Blasphemy is a perpetual sin against the Holy Spirit.
Wherefore I say unto you, All manner of sin and blasphemy shall be forgiven unto men: but the blasphemy against the Holy Ghost shall not be forgiven unto men. (Matthew 12:31 KJV)
God has clearly stated in His Word there is one unforgiveable sin and that sin is blasphemy against the Holy Spirit. Any man who makes a choice to continually reject the supernatural power of the Holy who convicts of sin by refusing to give heed to the drawing of the Holy Spirit will eventually be left to his sin in an eternal spiritually lost and darkened condition of his heart.
It is a dangerous position to be in to ignore or suppress the calling of the Holy Spirit because there is only the prospect of death, death upon this earth physically and spiritual death in the eternal realm. Both are an existence without the supernatural power of God and both are a hopeless and helpless existence.
Alive with God both spiritually quickened alive on this earth and forever in perfect fellowship with God in the eternal realm is only for those who have placed their faith in God through the work of His Son on the cross for the forgiveness of all their personal sin; past, present, and future.
God made a way for the forgiveness of all sin, unless man ignores and refuses the Holy Spirit’s pricking and convicting of his darkened unrepentant heart, therefore making a choice to remain dead in his sin now and forever.