The clouds poured down water; the skies resounded with thunder; Your arrows flashed back and forth.
PSALM 77 Whoever was the penman of this psalm, the Holy Spirit seems, by his mouth, to have dictated a common form of prayer for the Church in her afflictions, that even under the most cruel persecutions the faithful might not fail to address their prayers to heaven.
Commenting on Psalm 77:1-20
The clouds poured out water. Obedient to the Lord, the lower region of the atmosphere yielded its aid to overthrow the Egyptian host. The cloudy chariots of heaven hurried forward to discharge their floods. The skies sent out a sound. From the loftier aerial regions thundered the dread artillery of the Lord of Hosts.
The psalmist here recovers himself out of the great distress and plague he was in, and silences his own fears of God's casting off his people by the remembrance of the great things he had done for them formerly, which though he had in vain tried to quiet himself with (Psa 77:5, Psa 77:6) yet he tried again, and, upon this second trial, found it not in vain.
Commenting on Psalm 77:11-20