“Therefore,

I tell you!

People will be forgiven

For every sin

And blasphemy.

But blasphemy

Against the Spirit

Will not be forgiven.

Whoever speaks a word

Against the Son of man

Will be forgiven.

But whoever speaks

Against the Holy Spirit

Will not be forgiven,

Either in this age

Or in the age to come.”

 

Διὰ τοῦτο λέγω ὑμῖν, πᾶσα ἁμαρτία καὶ βλασφημία ἀφεθήσεται τοῖς ἀνθρώποις, ἡ δὲ τοῦ Πνεύματος βλασφημία οὐκ ἀφεθήσεται.

καὶ ὃς ἐὰν εἴπῃ λόγον κατὰ τοῦ Υἱοῦ τοῦ ἀνθρώπου, ἀφεθήσεται αὐτῷ· ὃς δ’ ἂν εἴπῃ κατὰ τοῦ Πνεύματος τοῦ Ἁγίου, οὐκ ἀφεθήσεται αὐτῷ οὔτε ἐν τούτῳ τῷ αἰῶνι οὔτε ἐν τῷ μέλλοντι.

 

There are similar statements to this in Mark, chapter 3:28-30, and Luke, chapter 12:10.  It might be okay to disrespect the Son of Man, but it is quite another thing to speak against or blasphemy the Holy Spirit.  Blasphemy was profaning the name of God.  If you profaned the Holy Spirit you were hopeless.  Only God could forgive.  If you gave up on God and his Spirit, there was no hope of forgiveness.  The Son of Man was so human that you could be forgiven for speaking against the Son of Man, Jesus, but not the Holy Spirit.  Jesus told them with a solemn proclamation (Διὰ τοῦτο λέγω ὑμῖν).  God would forgive all human sins and blasphemies (πᾶσα ἁμαρτία καὶ βλασφημία ἀφεθήσεται τοῖς ἀνθρώποις).  However, he would not forgive the sin of blasphemy against the Spirit (ἡ δὲ τοῦ Πνεύματος βλασφημία οὐκ ἀφεθήσεται).  Humans could speak against the Son of Man (καὶ ὃς ἐὰν εἴπῃ λόγον κατὰ τοῦ Υἱοῦ τοῦ ἀνθρώπου) and be forgiven (ἀφεθήσεται αὐτῷ).  However, anyone who spoke against the Holy Spirit (ὃς δ’ ἂν εἴπῃ κατὰ τοῦ Πνεύματος τοῦ Ἁγίου) would not be forgiven (οὐκ ἀφεθήσεται αὐτῷ), either now or in the future (οὔτε ἐν τούτῳ τῷ αἰῶνι οὔτε ἐν τῷ μέλλοντι).