The preparations were made, according to the command; and in obedience to a further injunction, Moses directed that a barrier be placed about the mount, that neither man nor beast might intrude upon the sacred precinct. If any ventured so much as to touch it, the penalty was instant death. (PP 304.1) MC VC

On the morning of the third day, as the eyes of all the people were turned toward the mount, its summit was covered with a thick cloud, which grew more black and dense, sweeping downward until the entire mountain was wrapped in darkness and awful mystery. Then a sound as of a trumpet was heard, summoning the people to meet with God; and Moses led them forth to the base of the mountain. From the thick darkness flashed vivid lightnings, while peals of thunder echoed and re-echoed among the surrounding heights. “And Mount Sinai was altogether on a smoke, because the Lord descended upon it in fire: and the smoke thereof ascended as the smoke of a furnace, and the whole mount quaked greatly.” Exodus 19:18. “The glory of the Lord was like devouring fire on the top of the mount”(Exodus 24:17) in the sight of the assembled multitude. And “the voice of the trumpet sounded long, and waxed louder and louder.” Exodus 19:19. So terrible were the tokens of Jehovah’s presence that the hosts of Israel shook with fear, and fell upon their faces before the Lord. Even Moses exclaimed, “I exceedingly fear and quake.” Hebrews 12:21. (PP 304.2) MC VC

And now the thunders ceased; the trumpet was no longer heard; the earth was still. There was a period of solemn silence, and then the voice of God was heard. Speaking out of the thick darkness that enshrouded Him, as He stood upon the mount, surrounded by a retinue of angels, the Lord made known His law. Moses, describing the scene, says: “The Lord came from Sinai, and rose up from Seir unto them; He shined forth from Mount Paran, and He came with ten thousands of saints: from His right hand went a fiery law for them. Yea, He loved the people; all His saints are in Thy hand: and they sat down at Thy feet; every one shall receive of Thy words.” Deuteronomy 33:2, 3. (PP 304.3) MC VC