Psalms 77:20 - Joseph Benson’s Commentary on the Old and New Testaments

Thou leddest thy people First through the sea, and afterward through the vast howling wilderness to Canaan; like a flock With singular care and tenderness, as a shepherd doth his sheep. The Psalm concludes abruptly, and does not apply those ancient instances of God's power to the present distresses, whether personal or national, as one might have expected. For as soon as the good man began to meditate on these things he found he had gained his point. His very entrance upon this matter gave him light and joy; his fears suddenly and strangely vanished, so that he needed to go no further; he went his way and did eat, and his countenance was no more sad.