Many people still do not understand the nature of the sin of blasphemy and why God cannot forgive it. They continue to blaspheme the Holy Spirit Of God, even while they themselves have been sealed with the Holy Spirit. If you know the truth of what the Holy Spirit is doing in the life of someone, and yet you contend that they are subject to a demonic or Satanic force, you have committed blasphemy. If you cannot determine whether or not someone has the indwelling Holy Spirit, you should ask the Holy Spirit whether he indwells the person. Listen in your heart for his response. If he says yes, you should have no further comment about the power that is at work in that person.
The Lord God Almighty El Shaddai