Before the law was given from Sinai, God wrought a miracle each week to impress the people with the sanctity of the Sabbath. He rained manna from heaven for their food, and each day they gathered this manna, but on the sixth day they gathered twice as much as usual, according to the directions of Moses....
“And the children of Israel did eat manna forty years, until they came to a land inhabited; they did eat manna, until they came unto the borders of the land of Canaan.” Thus for forty years God worked a miracle before His people each week, to show them that His Sabbath was a sacred day.
God directed that a tabernacle should be built where the Israelites, during their wilderness journeying, could worship Him. Orders from heaven were given that this tabernacle should be built without delay. Because of the sacredness of the work and the need for haste, some argued that the work on the tabernacle should be carried forward on the Sabbath, as well as on other days of the week. Christ heard these suggestions, and saw that the people were in great danger of being ensnared by concluding that they would be justified in working on the Sabbath so that the tabernacle might be completed as quickly as possible.
The word came to them, “Verily my sabbaths ye shall keep.” Though the work on the tabernacle must be carried forward with expedition, the Sabbath must not be employed as a working day. Even the work on the Lord's house must give way to the sacred observance of the Lord's rest day. Thus God is jealous for the honor of His memorial of creation.
The Sabbath is a token between God and His people. It is a holy day, given by the Creator to us as a day upon which to rest, and reflect upon sacred things. God designed it to be observed through every age as a perpetual covenant....
As we refrain from labor on the seventh day, we testify to the world that we are on God's side and are striving to live in perfect conformity to His commandments. Thus we recognize as our Sovereign the God who made the world in six days and rested on the seventh.... The true Sabbath is to be restored to its rightful position as God's rest day.—Manuscript 77, 1900 (The Review and Herald, October 28, 1902). CTr 110
Under the head of stimulants and narcotics is classed a great variety of articles that, altogether used as food or drink, irritate the stomach, poison the blood, and excite the nerves. Their use is a positive evil. Men seek the excitement of stimulants, because, for the time, the results are agreeable. But there is always a reaction. The use of unnatural stimulants always tends to excess, and it is an active agent in promoting physical degeneration and decay. MH 325
See, for that the Lord hath given you the sabbath, therefore he giveth you on the sixth day the bread of two days; abide ye every man in his place, let no man go out of his place on the seventh day. Exodus 16:29-30, KJV