Yep, and that's what John is talking about when he speaks of the Comforter who was to come. Not believing the Gospel of Salvation is blasphemy of the Spirit. It is the work of the Spirit to convince and convict through the preaching of the Gospel.
Matthew 12:31
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.
The work of the Spirit is mighty....full of power.
Ephesians 6:17 And take the helmet of salvation, and the sword of the Spirit, which is the word of God:
Hebrews 4:12 For the word of God is quick, and powerful, and sharper than any twoedged sword, piercing even to the dividing asunder of soul and spirit, and of the joints and marrow, and is a discerner of the thoughts and intents of the heart.
The Spirit is who puts the POWER in the word ...the Gospel of salvation.
Romans 1:16
For I am not ashamed of the gospel of Christ: for it is the power of God unto salvation to every one that believeth; to the Jew first, and also to the Greek.