15 Thou hast with [thine] arm redeemed thy people, the sons of Jacob and Joseph. Selah. 16 The waters saw thee, O God, the waters saw thee; they trembled, yea, the depths were troubled: 17 The thick clouds poured out water; the skies sent out a sound, yea, thine arrows went abroad: 18 The voice of thy thunder was in the whirlwind, lightnings lit up the world; the earth was troubled and it quaked. 19 Thy way is in the sea, and thy paths are in the great waters; and thy footsteps are not known. 20 Thou leddest thy people like a flock by the hand of Moses and Aaron.
Matthew Henry's Commentary on Psalm 77:15-20
Commentary on Psalm 77:11-20
(Read Psalm 77:11-20)
The remembrance of the works of God, will be a powerful remedy against distrust of his promise and goodness; for he is God, and changes not. God's way is in the sanctuary. We are sure that God is holy in all his works. God's ways are like the deep waters, which cannot be fathomed; like the way of a ship, which cannot be tracked. God brought Israel out of Egypt. This was typical of the great redemption to be wrought out in the fulness of time, both by price and power. If we have harboured doubtful thoughts, we should, without delay, turn our minds to meditate on that God, who spared not his own Son, but delivered him up for us all, that with him, he might freely give us all things.