The Ark of the Covenant was a sacred chest made by the ancient Israelites according to the command and design of God. It symbolised the presence of God in the midst of His people and housed and protected “the Testimony,” the Ten Commandments written on two tables of stone. (Revelation 11: 19; Exodus 25:9-11)
“And the temple of God which is in heaven was opened; and the ark of His covenant appeared in His temple, and there were flashes of lightning and sounds and peals of thunder and an earthquake and a great hailstorm.” Rev 11: 19
The ark in the tabernacle on earth contained the two tables of stone, upon which were inscribed the precepts of the law of God. The ark was merely a receptacle for the tables of the law, and the presence of these divine precepts gave to it its value and sacredness. When the temple of God was opened in heaven, the ark of His testament was seen. Within the holy of holies, in the sanctuary in heaven, the divine law is sacredly enshrined—the law that was spoken by God Himself amid the thunders of Sinai and written with His own finger on the tables of stone. The Great Controversy p. 433 EG White