The waters had then overwhelmed us. He embellishes by an elegant metaphor the preceding sentiment, comparing the dreadful impetuosity of the enemies of the Jews to an inundation, which swallows up whatever it meets with in its overflowing course. And he continues to preserve the character of a man affrighted. He names the waters, next the torrent, thirdly, the proud or impetuous waters. He says, over us, and over our soul, as if, by presenting the thing to the eye, he intended to strike terror into the people. And certainly this impassioned language ought to have all the effect of a graphic representation, that the faithful might the better feel from what a profound gulf they had been rescued by the hand of God. He only truly attributes his deliverance to God, who acknowledges himself to have been lost before he was delivered. The adverb them is here either demonstrative, as if the Psalmist had pointed to the thing with the finger, or it is taken for long ago. The former signification is, however, more suitable to the present passage.

Then the waters had overwhelmed us - Our destruction would have been as if the waves of the ocean had overwhelmed us.
The stream had gone over our soul - The torrent would have swept us away. Compare Psalm 18:4, Psalm 18:16.

Then the (c) waters had overwhelmed us, the stream had gone over our soul:
(c) He uses proper similitudes to express the great danger that the Church was in, and out of which God miraculously delivered them.

Then the waters had overwhelmed us,.... People, comparable to waters for their multitude, Strength, force, and impetuosity; which bear down all before them, and against which there is no standing; which, like the waters of the flood, overflow and destroy all they pass over. These are the floods of ungodly men, which are very destructive and terrible; see Revelation 17:15; together with all those reproaches, afflictions, and persecutions, which come along with them; which the presence of God only can bear up his people under, and carry them through, Song 8:7;
the stream had gone over our soul; and so deprived them of life; the whole force of the enemy; which, like a stream, flows in with great strength and rapidity, when a breach is made and spreads itself, Arama interprets it of the stream of the Egyptians, and restrains it to them, their armies and forces; but it rather designs others, and the enemies of God's people in general, which threaten their ruin, even their very souls and lives: it may be applied to the stream of corruptions, the flood of temptation and flow of persecutions, such as the flood the dragon cast out of his mouth after the woman; which, were it not for divine grace and assistance, would destroy the saints, who have no might against this great force, 2-Chronicles 20:12.

(Compare Psalm 18:4, Psalm 18:16).