sin

Every sin that man does may be forgiven but blasphemy against the Holy Spirit will never be forgiven to man.

Yes, it's in the Holy Bible that all sins can be forgiven to man except the blasphemy against the Holy Spirit and so we should beware not to blaspheme against the Holy Spirit.

"Every sin and blasphemy will be forgiven to me, but the blasphemy of the Spirit will not be forgiven. And whoever would say a word against the Son of Man, it will be forgiven to him; but whoever would say against the Holy Spirit, it will not be forgiven to him neither in this age nor in the one which is about to come" [Matthew 12:31-32 quoted from THE WILL New Testament (Greek to English)].

I thought there is no unpardonable sin. The verse of the Holy Bible is cited in the previous response. I hope that nobody will ever blaspheme the Holy Spirit.

well as for my opinion theres no such an unpardonable sin to God coz He's a forgiving God. As long as He knows that we feel real sorry and we're sincere in asking HIM forgiveness He'll surely forgive us no doubt about that. Perhaps we're only human born to make mistakes.