Among the worst methods is the psychological manipulation method, made famous in IFB. Here you manipulate emotions by scaring the dickens out of them by preaching about the torments of hell and then present Jesus, not as Creator, King, Lord, High Priest, Son of God, but rather as an insurance policy against such misfortune. First you appeal to their pride-driven sense of self-preservation, walk them quickly through the "Romans Road" and then press for a prayer, assuring them that by doing so they have "saved their soul" from eternal torment. Manipulation, misuse of Scripture, and Arminian decisionism all wrapped into one.

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Kipp Soncek
Pastoral Ministry Apprentice--Grace Church of Dupage
Student--Midwest Center for Theological Studies
Illinois; 1689 LBCF
But none of these things move me, neither count I my life dear unto myself, so that I might finish my course with joy, and the ministry, which I have received of the Lord Jesus, to testify the gospel of the grace of God.
Acts 20:24