Demons will seek to bring other centers of truth or other focal points besides Jesus. This demonstrates their true nature and shows their true allegiance to Satan who is opposed to Jesus Christ. The Holy Spirit - works to bring unity that is centered in Christ, yet a unity characterized by immense creativity and diversity. It is diversity, however, that is centered in Jesus Christ and within the parameters of the revealed word of God in Scripture and confirmed by the historic creeds of the church. Demons - by nature control and dehumanize.
Demons seek to have power over and to manipulate others.
They bring people into bondage and slavery. This reveals their nature and the quality of the Kingdom of Darkness. It is a regime of total control and bondage. The Holy Spirit - brings freedom and creativity. The Holy Spirit does not control, or take possession of, but rather invites our cooperation.