Read revelation 2:14 from your Bible
Witchcraft operations in a church also create an atmosphere that makes the word of God to be of no effect. The oppressive atmosphere will not allow the Spirit of God to work and preaching will be very difficult. People will not get saved and the church will be religious, nominal and carnal people.
I was once invited to a church where I could not preach. Immediately I was introduced and given the pulpit. I completely lost my message. Everything went dry and I could not remember anything I planned to say. I had to resort to prayer and boldly warned the witches to stop their operations; else, I would deal with them. It was after that, I was able to preach. If you are finding preaching very difficult in your church and people are not living as true Christians despite years of being in the church, then you should know that witches are operating very well in that church.
shalom!
#pstnath.
Jesus is Lord.