A more sure word of prophecy

In the very bosom of the Decalogue is the fourth commandment, as it was first proclaimed: “Remember the Sabbath day, to keep it holy. Six days shalt thou labor, and do all thy work: but the seventh day is the Sabbath of the Lord thy God: in it thou shalt not do any work, thou, nor thy son, nor thy daughter, thy manservant, nor thy maidservant, nor thy cattle, nor thy stranger that is within thy gates: for in six days the Lord made heaven and earth, the sea, and all that in them is, and rested the seventh day: wherefore the Lord blessed the Sabbath day, and hallowed it.” Exodus 20:8-11. CIHS 111.2

The Spirit of God impressed the hearts of those students of His word. The conviction was urged upon them that they had ignorantly transgressed this precept by disregarding the Creator’s rest day. They began to examine the reasons for observing the first day of the week instead of the day which God had sanctified. They could find no evidence in the Scriptures that the fourth commandment had been abolished, or that the Sabbath had been changed; the blessing which first hallowed the seventh day had never been removed. They had been honestly seeking to know and to do God’s will; now, as they saw themselves transgressors of His law, sorrow filled their hearts, and they manifested their loyalty to God by keeping His Sabbath holy. CIHS 111.3

Many and earnest were the efforts made to overthrow their faith. None could fail to see that if the earthly sanctuary was a figure or pattern of the heavenly, the law deposited in the ark on earth was an exact transcript of the law in the ark in heaven; and that an acceptance of the truth concerning the heavenly sanctuary involved an acknowledgment of the claims of God’s law and the obligation of the Sabbath of the fourth commandment.