What is the unforgivable sin?

[TonyChanYT]

I think there is only one unforgivable sin: A person commits it when he defiantly refuses the Holy Spirit for all time.

Numbers 15 (NIV):

30 “’But anyone who sins defiantly, whether native-born or foreigner, blasphemes the LORD and must be cut off from the people of Israel.

Sinning defiantly is associated with blaspheming the LORD. It is a person who hardens his heart against the LORD. It foreshadows Jesus' concept of blasphemy against the Holy Spirit. Some scribes were defiant despite Jesus' patience with them.

Luke 12:

10 everyone who speaks a word against the Son of Man will be forgiven, but anyone who blasphemes against the Holy Spirit will not be forgiven.

Matthew 12:

31 Therefore I tell you, every sin and blasphemy will be forgiven people, but the blasphemy against the Spirit will not be forgiven.

What is blasphemy against the Holy Spirit that will never be forgiven?

1 John 1:

9 If we confess our sins, he is faithful and just and will forgive us our sins and purify us from all unrighteousness.

If you confess, then this is proof that you have not committed the unforgivable sin.

How to logically unify Luke 12:10 (Matthew 12:31) and 1 John 1:9?

One way to do it is as follows:

Let P1 = the person who has blasphemed against the Holy Spirit.

This is a sin that P1 refuses to see as a sin. P1 has a hardness of heart. He stubbornly, persistently, and permanently refuses to repent for all time. He will never ask God to forgive him.

As Christians, we do not need to fear. Whether or not you think you have blasphemed against the Holy Spirit, humble yourself before God and He will forgive you all kinds of sins and blasphemies.

For a specific example of blasphemy against the Holy Spirit, see Whoever speaks against the Holy Spirit will NOT be forgiven.