Wolves in Sheeps Clothing: Part 2

The prince of evil contests every inch of ground over which God's people advance in their journey toward the heavenly city. In all the history of the church no reformation has been carried forward without encountering serious obstacles. Thus it was in Paul's day. Wherever the apostle raised up a church, there were some who professed to receive the faith, but who brought in heresies, that, if received, would eventually crowd out the love of the truth. Luther also suffered great perplexity and distress from the course of fanatical persons who claimed that God had spoken directly through them, and who therefore set their own ideas and opinions above the testimony of the Scriptures. Many who were lacking in faith and experience, but who had considerable self-sufficiency, and who loved to hear and tell some new thing, were beguiled by the pretensions of the new teachers, and they joined the agents of Satan in their work of tearing down what God had moved Luther to build up. And the Wesleys, and others who blessed the world by their influence and their faith, encountered at every step the wiles of Satan in pushing overzealous, unbalanced, and unsanctified ones into fanaticism of every grade.

Great Controversy pg. 396