And it came to pass, when ye heard the voice - See the notes on Exodus 20:18, etc.

Exodus 20:18,19 And all the people saw the thunder, and the lightning, and the noise of the trumpet, and the mountain smoking...

Hebrews 12:18-21 For you are not come to the mount that might be touched, and that burned with fire, nor to blackness, and darkness, and tempest...

"They have Corrupted Themselves; their Spot is not the Spot of his Children; they are a Perverse and Crooked Generation. "
Deut. xxxii. 5.--"They have corrupted themselves; their spot is not the spot of his children; they are a perverse and crooked generation." We doubt this people would take well with such a description of themselves as Moses gives. It might seem strange to us, that God should have chosen such a people out of all the nations of the earth, and they to be so rebellious and perverse, if our own experience did not teach us how free his choice is, and how long-suffering he is, and constant in his choice. …
Hugh Binning—The Works of the Rev. Hugh Binning

Deuteronomy
Owing to the comparatively loose nature of the connection between consecutive passages in the legislative section, it is difficult to present an adequate summary of the book of Deuteronomy. In the first section, i.-iv. 40, Moses, after reviewing the recent history of the people, and showing how it reveals Jehovah's love for Israel, earnestly urges upon them the duty of keeping His laws, reminding them of His spirituality and absoluteness. Then follows the appointment, iv. 41-43--here irrelevant (cf. …
John Edgar McFadyen—Introduction to the Old Testament