The people here entered into a solemn covenant with God, and accepted him as their ruler, by which they became the peculiar subjects of his divine authority. “And the Lord said unto Moses, Lo, I come unto thee in a thick cloud, that the people may hear when I speak with thee, and believe thee forever.” When the Hebrews had met with difficulties in the way, they were disposed to murmur against Moses and Aaron, and accuse them of leading the host of Israel from Egypt to destroy them. God would honor Moses before them, that they might be led to confide in his instructions, and know that he had put his Spirit upon him. (3SG 262.1) MC VC

The Lord then gave Moses express directions in regard to preparing the people for him to approach nigh to them that they might hear his law spoken, not by angels, but by himself. “And the Lord said unto Moses, go unto the people, and sanctify them today and tomorrow, and let them wash their clothes, and be ready against the third day; for the third day the Lord will come down in the sight of all the people upon Mount Sinai.” The people were required to refrain from worldly labor and care, and to possess devotional thoughts. God required them also to wash their clothes. He is no less particular now than he was then. He is a God of order, and requires his people now upon the earth to observe habits of strict cleanliness. And those who worship God with uncleanly garments and persons do not come before him in an acceptable manner. He is not pleased with their lack of reverence for him, and he will not accept the service of filthy worshipers, for they insult their Maker. The Creator of the heavens and of the earth considered cleanliness of so much importance that he said, “And let them wash their clothes.” (3SG 262.2) MC VC