John Gills Exposition of the Bible Commentary - Exodus 20:18
And all the people saw the thunderings, and the lightnings ,.... That is, they heard the one, and saw the other; they heard the dreadful volleys of thunder, and saw the amazing flashes of lightning, which were like lamps and torches, as the word used signifies; by a communication of senses, one sense is put for another, and the sense of sight being the principal, as Ben Melech observes, it is put for the rest, and so in the following. It is an observation of Austin's F15 Confess. l. 10.... read more
Matthew Henry's Complete Commentary - Exodus 20:18-21
I. The extraordinary terror with which the law was given. Never was any thing delivered with such awful pomp; every word was accented, and every sentence paused, with thunder and lightning, much louder and brighter, no doubt, than ordinary. And why was the law given in this dreadful manner, and with all this tremendous ceremony? 1. It was designed (once for all) to give a sensible discovery of the glorious majesty of God, for the assistance of our faith concerning it, that, knowing the terror... read more