“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.’ ‘The glory of the Lord was like devouring fire on the top of the mount’ in the sight of the assembled multitude. And ‘the voice of the trumpet sounded long, and waxed louder and louder.’ 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.
“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.
“Jehovah revealed Himself, not alone in the awful majesty of the judge and lawgiver, but as the compassionate guardian of His people: ‘I am the Lord thy God, which have brought thee out of the land of Egypt, out of the house of bondage.’ He whom they had already known as their Guide and Deliverer, who had brought them forth from Egypt, making a way for them through the sea, and overthrowing Pharaoh and his hosts, who had thus shown Himself to be above all the gods of Egypt—He it was who now spoke His law.
“The law was not spoken at this time exclusively for the benefit of the Hebrews. God honored them by making them the guardians and keepers of His law, but it was to be held as a sacred trust for the whole world. The precepts of the Decalogue are adapted to all mankind, and they were given for the instruction and government of all. Ten precepts, brief, comprehensive, and authoritative, cover the duty of man to God and to his fellow man; and all based upon the great fundamental principle of love.”
(White, Patriarchs and Prophets, 304, 305.)