This Sunday's reading from Exodus 20:1-4,7-9,12-20 cuts out some of the words God spoke to the Hebrews (four chapters before Moses chisels the Ten Commandments). I have included the missing words and highlighted them in red. As you read them, ask yoursef, "Why would the lectionary editors strike them out?).
"Then God spoke all these words:
2 'I am the Lord your God, who brought you out of the land of Egypt, out of the house of slavery; 3you shall have no other gods before me.
4 You shall not make for yourself an idol, whether in the form of anything that is in heaven above, or that is on the earth beneath, or that is in the water under the earth.
5 You shall not bow down to them or worship them; for I the Lord your God am a jealous God, punishing children for the iniquity of parents, to the third and the fourth generation of those who reject me, 6 but showing steadfast love to the thousandth generation of those who love me and keep my commandments.
7 You shall not make wrongful use of the name of the Lord your God, for the Lord will not acquit anyone who misuses his name.
8 Remember the sabbath day, and keep it holy. 9 For six days you shall labour and do all your work.
10 But the seventh day is a sabbath to the Lord your God; you shall not do any work—you, your son or your daughter, your male or female slave, your livestock, or the alien resident in your towns. 11 For in six days the Lord made heaven and earth, the sea, and all that is in them, but rested the seventh day; therefore the Lord blessed the sabbath day and consecrated it.
12 Honour your father and your mother, so that your days may be long in the land that the Lord your God is giving you.
13 You shall not murder.
14 You shall not commit adultery.
15 You shall not steal.
16 You shall not bear false witness against your neighbour.
17 You shall not covet your neighbour’s house; you shall not covet your neighbour’s wife, or male or female slave, or ox, or donkey, or anything that belongs to your neighbour."
18 "When all the people witnessed the thunder and lightning, the sound of the trumpet, and the mountain smoking, they were afraid and trembled and stood at a distance, 19 and said to Moses, ‘You speak to us, and we will listen; but do not let God speak to us, or we will die.’ 20 Moses said to the people, ‘Do not be afraid; for God has come only to test you and to put the fear of him upon you so that you do not sin.’"
To the modern ear, the red verses certainly sound offensive and would require an in depth exposition from a knowledgeable preacher in order for pewsitters to understand God's words.
Oh, I just realized why the lectionary editors left those verses out.
There is a dearth of preachers with those qualifications who follow the Revised Common Lectionary.