The American Bible Society and Church Missions document lists the Seventh-day Adventist Church as the only universally distributed Protestant denomination in the world. The Catholic Church demands obedience to its system and claims Sunday as the mark of her authority, and the Seventh-day Adventist Church propagates obedience to God and Him only and upholds the Seventh day Sabbath as the sign of obedience to God, in accordance with the Scriptures.

As Catholics admit, compromise is impossible:

Reason and common sense demand the acceptance of One or the other of these alternatives: either Protestantism and the keeping holy of Saturday, or Catholicity and the keeping holy of Sunday. Compromise is impossible.ⁱ

Pope John Pauls II’s encyclical on Sunday worship calls the world to honor that day.ⁱⁱ Conversely, the Seventh-day Adventist Church warns the world against accepting Sunday—the mark of the Beast. The Adventist Church is protesting against the stealing of God’s authority. This is the recipe for the final conflict.

As the Roman Catholic Church admits, the Adventists have the authority of Scripture on their side in this confrontation. In fact, they boast that Protestants keeping Sunday are paying homage to them:

You may read the Bible from Genesis to Revelation, and you will not find a single line authorizing the sanctification of Sunday. The Scriptures enforce the religious observance of Saturday, A day which we never sanctify.ⁱⁱⁱ

Thus the observance of Sunday by Protestants is an homage they pay, in spite of themselves, to the authority of the (Catholic) Church.^iv

The Catholic Church openly acknowledges that only the Seventh-day Adventist Church is acting in accordance with the Scriptures:

The Adventists are the only body of Christians with the Bible as their teacher, who can find no warrant in its pages for the change of the day from the seventh to the first. Hence their appellation, "Seventh-day Adventists." Their cardinal principle consists in setting apart Saturday for the exclusive worship of God, in conformity with the positive command of God himself, repeatedly reiterated in the sacred books of the Old and New Testaments, literally obeyed by the children of Israel for thousands of years to this day, and endorsed by the teaching and practice of the Son of God whilst on earth (emphasis added). ^v

The (Catholic) Church changed the observance of the Sabbath to Sunday by right of the divine, infallible authority given to her by her Founder, Jesus Christ. The Protestant claiming the Bible to be the only guide of faith has no warrant for observing Sunday. In this matter the Seventh-day Adventist is the only consistent Protestant.^vi

The Saint Catherine Catholic Church Sentinel had this to say on the issue:

People who think that the Scriptures should be the sole authority, should logically become 7th Day Adventists, and keep Saturday holy.^vii

The choice is ours: will we follow the commandments of God or the commandments of people? Those who knowingly disobey God will have to give an account to God.

The final conflict in the great war between Christ and Satan is about to unfold. Once the mark of the Beast has been legislated and each person has a chance to choose where they will put their allegiance, probation will close and Christ will return.

The redeemed will sing a “new song before the throne.” Their unique experience as those who come out of the last tribulation will qualify them to sing this song of praise to the God. The choice is clear. God longs to redeem us. He didn't even spared His own Son, and wants to give us all things. Today, if you hear His voice, do not harden your heart.