Mormonism and Jehovah's Witnesses claim to restore a church that Christ, however, promised never to lose. Jesus told Peter that he would build his church on that rock and that the gates of hell would not prevail against it (Matt 16:18). Mormonism adds new scriptures to the Bible, compromising its sufficiency and its exclusive authority as God's final word. Moreover, its doctrine of salvation depends on merit and eternal progression, rather than on grace received through faith alone. Jehovah's Witnesses, for their part, deny the Trinity and reduce Jesus to an exalted creature, identifying him with the archangel Michael. Their exclusivist eschatology can also isolate entire families from the wider Christian fellowship, treating contact with other churches as a spiritual danger.
Adventism, unlike these two groups, preserves essential elements of the historic Christian faith. It therefore requires more careful discernment than groups whose doctrinal deviations are more obvious. Even so, grace ceases to be grace when any human element is added as a condition for salvation. Paul wrote to the Romans: “if it is by grace, it is no longer on the basis of works; otherwise grace would no longer be grace” (Rom 11:6). Christian Science goes further still, turning sin, disease, and pain into mere illusions of the mind, with real and tragic consequences when someone refuses legitimate medical treatment because of this doctrine. The Congregação Cristã in Brazil, for its part, turns legitimate cultural customs — such as dress, music, and certain social behaviors — into non-negotiable doctrinal requirements. Genuine Christian unity, however, is found in a common faith in Christ, not in uniformity of external, culturally conditioned customs.
Neo-Pentecostalism, identified as the third wave of the Brazilian Pentecostal movement, has replaced the historic centrality of repentance and sanctification with the promise of immediate material prosperity. So-called prosperity theology turns faith into a kind of commercial transaction: sow, confess, and reap. In doing so, it reduces God to an automatic guarantor of results, directly contradicting his sovereignty and his free, unmerited mercy. When exported to contexts of extreme poverty, this message becomes an especially cruel heresy, for it promises what Scripture never offered unconditionally. Paul learned, by contrast, that God's grace was sufficient for him, because Christ's power is made perfect precisely in human weakness (2 Cor 12:9). No prosperity formula can replace that truth without distorting the gospel.
Faced with all these groups, mature discernment does not treat every difference as a grave heresy, nor does it dismiss every real heresy as a trivial difference. The task requires evaluating each case with fairness and biblical precision. Memorize Matthew 16:18 as a direct answer to any claim that the church of Christ needs to be restored, since he himself promised that the gates of hell would not prevail against it.
If you know a Mormon, a Jehovah's Witness, or someone involved in prosperity theology, pray for that person before attempting any direct dialogue about doctrine. Write, in your own words, the central difference between salvation by merit and salvation by grace received through faith alone. Examine your own prayer life as well: does it genuinely seek God's will, or does it try, without your realizing it, to secure a specific outcome you have already decided should happen?
Want to know more about the work of Projeto Didasko in Portugal?