As a sign between God and His people, the Sabbath, which is Saturday, the seventh-day of the week, was given to man. It was made for our sake (Mark 2:27), as a means for our sanctification (Ezekiel 20:12).

As God rested on the seventh day, blessed, and sanctified it (Genesis 2:2-3), so we ought to keep it holy (Exodus 20:8), not doing our own ways, nor finding our own pleasure, nor speaking our own words (Isaiah 58 :13). For “blessed is the man that doeth this, and the son of man that layeth hold on it; that keepeth the sabbath from polluting it, and keepeth his hand from doing any evil” (Isaiah 56:2).

“The Sabbath is… to be remembered and observed as the memorial of the Creator's work. Pointing to God as the Maker of the heavens and the earth, it distinguishes the true God from all false gods. All who keep the seventh day signify by this act that they are worshipers of Jehovah. Thus the Sabbath is the sign of man's allegiance to God as long as there are any upon the earth to serve Him. The fourth commandment is the only one of all the ten in which are found both the name and the title of the Lawgiver. It is the only one that shows by whose authority the law is given. Thus it contains the seal of God, affixed to His law as evidence of its authenticity and binding force.” (EGW, Patriarchs and Prophets, p. 307.2)

“By the observance of the sanctified rest-day of the Creator, He is acknowledged as the true God, in distinction from every object upon which the eye can rest, in the heavens above or in the earth beneath.” (J. N. Andrews, The Three Angels Messages, p.51)

“…God established the seventh day Sabbath in Paradise, on the very day when he rested from all his work, and not one week, nor one year, not two thousand five hundred and fourteen years afterwards, as some would have it. Is it not plain that the Sabbath was instituted to commemorate the stupendous work of creation, and designed by God to be celebrated by his worshipers as a weekly Sabbath.” (Joseph Bates, The Seventh Day Sabbath, A Perpetual Sign, p.53)