Verily my sabbaths ye shall keep: for it is a sign between me and you throughout your generations; that ye may know that I am the Lord that doth sanctify you. Exodus 31:13. LHU 53.1
The Sabbath was given to all mankind to commemorate the work of creation. The great Jehovah, when He had laid the foundations of the earth, when He had dressed the whole world in its garb of beauty, and created all the wonders of the land and the sea, instituted the Sabbath day and made it holy. When the morning stars sang together, and all the sons of God shouted for joy, the Sabbath was set apart as God's memorial. God sanctified and blessed the day in which He has rested from all His wondrous work. And this Sabbath, sanctified of God, was to be kept for a perpetual covenant. It was a memorial that was to stand from age to age, till the close of earth's history. LHU 53.2
God brought the Hebrews out of their Egyptian bondage, and commanded them to observe His Sabbath, and keep the law given in Eden. Every week He worked a miracle to establish in their minds the fact that in the beginning of the world He had instituted the Sabbath.... LHU 53.3
There are those who hold that the Sabbath was given only for the Jews; but God has never said this. He committed the Sabbath to His people Israel as a sacred trust; but the very fact that the desert of Sinai, and not Palestine, was the place selected by Him in which to proclaim His law, reveals that He intended it for all mankind. The law of ten commandments is as old as creation. Therefore the Sabbath institution has no special relation to the Jews, any more than to all other created beings. God has made the observance of the Sabbath obligatory upon all men. “The sabbath,” it is plainly stated, “was made for man.” Let every one, therefore, who is in danger of being deceived on this point give heed to the Word of God rather than the assertions of men. LHU 53.4
In Eden, God said to Adam concerning the tree of knowledge, “In the day that thou eatest thereof thou shalt surely die.” “And the serpent said unto the woman, Ye shall not surely die: for God doth know that in the day ye eat thereof, then your eyes shall be opened, and ye shall be as gods, knowing good and evil.” Adam listened to the voice of Satan speaking through his wife; he believed another voice than that which spoke the law in Eden.... LHU 53.5
As the tree of knowledge was the test of Adam's obedience, so the fourth command is the test that God has given to prove the loyalty of all His people. The experience of Adam is to be a warning to us so long as time shall last. It warns us not to receive any assurance from the mouth of men or of angels that will detract one jot or tittle from the sacred law of Jehovah (The Review and Herald, August 30, 1898). LHU 53.6