Seventh-Day Adventists agree with many Catholic doctrines, including the Trinity, Christ’s divinity, the virgin birth, the atonement, a physical resurrection of the dead, and Christ’s Second Coming. They use a valid form of baptism. They believe in original sin and reject the Evangelical teaching that one can never lose one’s salvation no matter what one does (i.e., they correctly reject “once saved, always saved”).
Unfortunately, they also hold many false and strange doctrines. Among these are the following: (a) the Catholic Church is the Whore of Babylon; (b) the pope is the Antichrist; (c) in the last days, Sunday worship will be “the mark of the beast”; (d) there is a future millennium in which the devil will roam the earth while Christians are with Christ in heaven; (e) the soul sleeps between death and resurrection; and (f) on the last day, after a limited period of punishment in hell, the wicked will be annihilated and cease to exist rather than be eternally damned. (For rebuttals of many of these ideas, see the Catholic Answers tracts, The Antichrist, The Hell There Is, Hunting the Whore of Babylon, The Whore of Babylon, and Sabbath or Sunday?)
Many Adventists insist that, as a matter of discipline (not doctrine), one must not eat meats considered unclean under the Mosaic Law (many endorse total vegetarianism), and one must avoid “worldly entertainments” (card-playing, dancing, smoking, drinking, reading non-religious books, listening to non-religious music, watching non-religious television, going to the movies, etc.).
Adventists also subscribe to the two Protestant shibboleths, sola scriptura (the Bible is the sole rule of faith) and sola fide (justification is by faith alone). Other Protestants, especially conservative Evangelicals and Fundamentalists, often attack Adventists on these points, claiming they do not really hold them, which is often used as “proof” that they are “a cult.” However, along the spectrum of Protestantism (from high-church Lutherans and Anglicans to low-church Pentecostals and Baptists), there is little agreement about the meaning of these two phrases or about the doctrines they are supposed to represent.