Jesus refuted the argument that he was expelling demons by Satan’s power, and he warned that making such statements is an unforgivable sin against the Holy Spirit.

Matthew 12:22-32

22 One day when Jesus was at home, some men brought to Jesus a man who, because of being controlled by a demon {a demon controlled him}, was blind and unable to speak. Jesus healed him by expelling the demon. As a result, the man began to talk and was able to see. 23 All the crowd who saw it marveled. They began asking each other, “Could this man be the Messiah, the descendant of King David, whom we have been expecting?” 24 Because the Pharisees and the men who taught the Jewish laws heard that the people thought that Jesus might be the Messiah because he had expelled the demon, they said, “It is not God, but Beelzebub, the ruler of the demons, who enables this man to expel demons from people!” 25 But Jesus knew what the Pharisees were thinking and saying. So, in order to show them that what they said did not make sense, he said to them, “If the people in [MTY] one nation fight against each other, they will destroy their nation {their nation will be destroyed}. If people who live in the same city or house fight each other, they will certainly not remain as one group or family. 26 Similarly, if Satan were expelling his own demons [MTY], it would be as though he was fighting against himself. ◄His kingdom would not continue!/How could his kingdom continue?► [RHQ] His rule over them would certainly not last! 27 Furthermore, if it is true that Satan enables me to expel demons, is it also true that your disciples who expel demons do so by Satan’s power [RHQ]? No So they will show you that you are not thinking logically. 28 But because it is God’s Spirit who enables me to expel demons, that proves that the power of God to rule people’s lives has come to you.

29 I will illustrate why I am able to expel demons. ◄A person cannot go into the house of a strong man► [RHQ] But if he ties up the strong man, then he will be able to steal the things in that man’s house.

30 No one can be neutral. Those who do not acknowledge that the Holy Spirit enables me to expel demons are opposing me, and those who do not gather people to become my disciples are causing those people to [DOU] go away from me.

31 You are saying that it is not the Holy Spirit who is enabling me to expel demons. So I will say this to you: If those who offend and slander other people in any way are then sorry and ask God to forgive them, God will forgive them. But people who discredit what the Holy Spirit does will not be forgiven {God will not forgive people who discredit what the Holy Spirit does}. 32 God is willing to forgive people who criticize me, the One who came from heaven. But I warn you that those who say evil things about what the Holy Spirit does will not be forgiven {God will not forgive people who speak evil words about what the Holy Spirit does}. They will not be forgiven {He will not forgive them} now, and they will never be forgiven {he will never forgive them}.”