The book of Revelation is very clear that in the final days of this earth’s history, everybody in the world will be marked or sealed. Some will be sealed with the seal of the living God and they will be saved. (See Revelation 7:1–8; 9:4; 14:1–5; 15:2, 3.) Unfortunately, the great majority of the world’s population will receive the mark of the beast, sometimes referred to as the mark of antichrist. (See Revelation 13:1–10.) The antichrist power is also described in Daniel 7 and in 2 Thessalonians 2. Those who receive this mark will lose their souls. (See Revelation 14:9–12; Revelation 15:1; 16:2; 19:20, 21.)
The words seal and sign are used interchangeably in the Bible. (See Romans 4:11.) The sign or seal of God has always been the fourth commandment—the Sabbath commandment. (See Exodus 31:12–18 and Ezekiel 20:12–20.)
Jesus said that not even part of a letter of the law can be changed. (See Luke 16:17.) Note that the Ten Commandments were spoken verbally by God to the human family and did not come through visions or dreams of prophets. (See Deuteronomy 5:22.) To attempt to change the Sabbath is to attempt to change the longest commandment in the Ten Commandment law and in this way to exalt oneself above the Lawgiver and thereby become an antichrist power. (Compare Daniel 7:25.)]
Has anyone attempted to change the Sabbath commandment? Yes.
“Sunday is a Catholic institution, and its claims to observance can be defended only on Catholic principles. … From beginning to end of Scripture there is not a single passage that warrants the transfer of weekly public worship from the last day of the week to the first.” Catholic Press, Sydney, Australia, August, 1900.
“Of course the Catholic Church claims that the change was her act. It could not have been otherwise as none in those days would have dreamed of doing anything in matters spiritual and ecclesiastical and religious without her. And the act is a mark of ecclesiastical power and authority in religious matters.” James Cardinal Gibbons, in a letter to J. F. Snyder of Bloomington, Illinois, dated November 11, 1895, and signed by H. F. Thomas, Chancellor for the Cardinal.
“Protestants … accept Sunday rather than Saturday as the day for public worship after the Catholic Church made the change … But the Protestant’s mind does not seem to realize that in accepting the Bible, in observing the Sunday, they are accepting the authority of the spokesman for the church, the Pope.” Our Sunday Visitor, February 5, 1950.