Is blasphemy against the Holy Spirit is the only Unforgivable Sin? Or is there any other ?
“For if you forgive men their trespasses, your heavenly Father will also forgive you. 15 But if you do not forgive men their trespasses, neither will your Father forgive your trespasses." - Matt 6:14-15
Jesus told us that we must forgive others. If we do not, then God will not forgive us.
And as we see in His teaching, even if we have been forgiven, God will take that forgiveness back if we harbor unforgiveness toward another -
"Therefore the kingdom of heaven is like a certain king who wanted to settle accounts with his servants. 24 And when he had begun to settle accounts, one was brought to him who owed him ten thousand talents. 25 But as he was not able to pay, his master commanded that he be sold, with his wife and children and all that he had, and that payment be made. 26 The servant therefore fell down before him, saying, ‘Master, have patience with me, and I will pay you all.’ 27 Then the master of that servant was moved with compassion, released him, and forgave him the debt.
28 “But that servant went out and found one of his fellow servants who owed him a hundred denarii; and he laid hands on him and took him by the throat, saying, ‘Pay me what you owe!’ 29 So his fellow servant fell down at his feet and begged him, saying, ‘Have patience with me, and I will pay you all.’ 30 And he would not, but went and threw him into prison till he should pay the debt. 31 So when his fellow servants saw what had been done, they were very grieved, and came and told their master all that had been done. 32 Then his master, after he had called him, said to him, ‘You wicked servant! I forgave you all that debt because you begged me. 33 Should you not also have had compassion on your fellow servant, just as I had pity on you?’ 34 And his master was angry, and delivered him to the torturers until he should pay all that was due to him.
35 “So My heavenly Father also will do to you if each of you, from his heart, does not forgive his brother his trespasses.” - Matt 18:23-35
Some will try to explain this Truth away, but Jesus is very clear here. The "master" in the teaching took back the forgiveness he had given and brought judgment upon the one who
had been forgiven their debt. And Jesus said the Father will do the same to us. Our forgiveness is conditional upon our repentance and obedience, despite what many claim today. The canon of Scripture is what we must adhere to.
We also have this in John's letter, which tells us there is a sin which we are not even to pray for another about, for it leads to death. But he is not specific -
"If anyone sees his brother sinning a sin which does not lead to death, he will ask, and He will give him life for those who commit sin not leading to death. There is sin leading to death. I do not say that he should pray about that. 17 All unrighteousness is sin, and there is sin not leading to death." - 1John 5:16-17
Bottom line is... we can not put God in a box. Our place is to walk in the Light, obey His charge to us, extend forgiveness to all, and repent when the Holy Spirit reveals sin in us that will not inherit the Kingdom.
Amen.
God's wisdom and understanding to us all.