(16-20) Thunders and lightnings, and a thick cloud. — Compare with this description that of Deut. (Deuteronomy 4:11-12), which is fuller in some respects: — “Ye came near and stood under the mountain; and the mountain burned with fire unto the midst of heaven, with darkness, clouds, and thick darkness. And the Lord spake unto you out of the fire: ye heard the voice of the words, but saw no similitude; only ye heard a voice.” The phenomena accumulated to impress the people seem to have been loud thunder, fierce flashes of lightning, a fire that streamed up from the mountain to the middle of the sky, dense volumes of smoke producing an awful and weird darkness, a trembling of the mountain as by a continuous earthquake, a sound like the blare of a trumpet loud and prolonged, and then finally a clear penetrating voice. So awful a manifestation has never been made at any other place or time, nor will be until the consummation of all things. To regard it as a mere “storm of thunder and lightning,” or as “an earthquake with volcanic eruptions,” is to miss altogether the meaning of the author, and to empty his narrative of all its natural significance.
The voice of the trumpet. — Heb., a voice of a trumpet. The trumpet’s blare is the signal of a herald calling attention to a proclamation about to be made. At the last day the coming of Christ is to be announced by “the trump of God” (1 Thessalonians 4:16). In the Apocalypse angels are often represented as sounding with trumpets (Revelation 8:7-8; Revelation 8:10; Revelation 8:12; Revelation 9:1; Revelation 9:14, &c.) when some great event is about to occur.