Truly I tell you, people can be forgiven all their sins and every slander they utter, but whoever blasphemes against the Holy Spirit will never be forgiven; they are guilty of an eternal sin. Mark 3:28-29 NIV
One can be forgiven for slander against the Son of God. Taking the name of the Lord in vain can be done in a moment of rage, angered intensely by something. Ignorance of the total being of Jesus Christ also can be forgiven. Why is it that blasphemy of the Holy Spirit is an eternal sin, not forgivable? The Holy Spirit is the Sprit of God. He indwelled Jesus Christ and also indwells those who belong to Christ. The Holy Spirit directs the believer toward doing works for God. One who blasphemes the Holy Spirt then does so to the indwelling Spirit of God and to the work of God done by the vessel which the Holy Spirit indwells. One may not blaspheme the work of God and expect any form of forgiveness. God is Spirit. Those who worship God do so in Spirit. To blaspheme the Holy Spirit is to blaspheme the character of God. This, Jesus tells us is the one sin which shall never be forgiven. Let the Holy Spirit indwell you, directing you to the work which God wishes you to do for Him.