I didn't add any words to the Bible. When I explain the Bible to you, you don't like my explanation so that is the silly accusation you make, but you know I am right.
What about the unpardonable sin? It cannot be committed today. It is impossible to commit this sin. Why? Look at the context. Take it from the beginning.
Matthew 12:22 Then was brought unto him one possessed with a devil, blind, and dumb: and he healed him, insomuch that the blind and dumb both spake and saw.
--Jesus performed a miracle by casting out a demon and healing this man.
Matthew 12:24 But when the Pharisees heard it, they said, This fellow doth not cast out devils, but by Beelzebub the prince of the devils.
Beelzebub was another name for Satan.
The accusation here was that he performed the miracle by the power of Satan.
Matthew 12:25 And Jesus knew their thoughts, and said unto them, Every kingdom divided against itself is brought to desolation; and every city or house divided against itself shall not stand:
26 And if Satan cast out Satan, he is divided against himself; how shall then his kingdom stand?
27 And if I by Beelzebub cast out devils, by whom do your children cast them out? therefore they shall be your judges.
--A solid argument that could not be defeated.
The Pharisees claimed to cast out demons also. Jesus was a prophet among the people. If he cast them out by Satan then by whose power did they cast them out? The kingdom cannot be divided. IOW, if he was casting them out by Satan's power so were they.
Matthew 12:30 He that is not with me is against me; and he that gathereth not with me scattereth abroad.
--Christ has taken his stand with the Father. He came to do the will of the Father. There are only two parties here. Satan and God. You are either on God's side (Christ's) or against Him. Which one?
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.
32 And whosoever speaketh a word against the Son of man, it shall be forgiven him: but whosoever speaketh against the Holy Ghost, it shall not be forgiven him, neither in this world, neither in the world to come.
Now go back to the beginning and remember that they brought to him one possessed of a demon, and he cast the demon out, and then they accused him that he did this by the power of Satan, also an evil spirit.
They were seeing Jesus, God in the flesh. They had heard his words, seen his miracles, and had just witnessed one of them. And yet they attributed this miracle to the power of an evil spirit, Satan himself. That is blasphemy! They attributed the works of Christ, this miracle of Christ to the power of an evil spirit, not to the power of the Holy Spirit, the Spirit through whom Christ works.
He stood before them as a man. He demonstrated his deity through his miracles done in the power of His Spirit which was the Holy Spirit. Instead of attributing that power to the Spirit of God they attributed it to the spirit of Satan. That is blasphemy against the Holy Spirit.
This cannot be committed today for Jesus does not stand in front of us doing miracles by the power of the Holy Spirit which we are able to attribute to the power of Satan. It is impossible to commit this sin today.