The great deceiver has many agents ready to present any and every kind of error to ensnare souls—heresies prepared to suit the varied tastes and capacities of those whom he would ruin. It is his plan to bring into the church insincere, unregenerate elements that will encourage doubt and unbelief, and hinder all who desire to see the work of God advance and to advance with it. Many who have no real faith in God or in His word assent to some principles of truth and pass as Christians, and thus they are enabled to introduce their errors as Scriptural doctrines. (GC 520.1) MC VC

The position that it is of no consequence what men believe is one of Satan’s most successful deceptions. He knows that the truth, received in the love of it, sanctifies the soul of the receiver; therefore he is constantly seeking to substitute false theories, fables, another gospel. From the beginning the servants of God have contended against false teachers, not merely as vicious men, but as inculcators of falsehoods that were fatal to the soul. Elijah, Jeremiah, Paul, firmly and fearlessly opposed those who were turning men from the word of God. That liberality which regards a correct religious faith as unimportant found no favor with these holy defenders of the truth. (GC 520.2) MC VC

The vague and fanciful interpretations of Scripture, and the many conflicting theories concerning religious faith, that are found in the Christian world are the work of our great adversary to confuse minds so that they shall not discern the truth. And the discord and division which exist among the churches of Christendom are in a great measure due to the prevailing custom of wresting the Scriptures to support a favorite theory. Instead of carefully studying God’s word with humility of heart to obtain a knowledge of His will, many seek only to discover something odd or original. (GC 520.3) MC VC