In distress you called, and I delivered you; I answered you in the secret place of thunder; I tested you at the waters of Meribah. Selah
PSALM 81 This psalm consists of two parts. Whoever was its author, he exhorts the people to remember the unparalleled grace of God towards them, in delivering them by his outstretched arm, and choosing them to be a kingdom of priests, and a peculiar Church to himself; that thus they may be excited devoutly to honor their deliverer, both by celebrating his praises, and by leading a holy life.
Commenting on Psalm 81:1-16
Thou calledst in trouble, and I delivered thee. God heard his people's cries in Egypt, and at the Red Sea: this ought to have bound them to him. Since God does not forsake us in our need, we ought never to forsake him at any time. When our hearts wander from God, our answered prayers cry "shame" upon us. I answered thee in the secret place of thunder.
When the people of God were gathered together in the solemn day, the day of the feast of the Lord, they must be told that they had business to do, for we do not go to church to sleep nor to be idle; no, there is that which the duty of every day requires, work of the day, which is to be done in its day. And here, I.
Commenting on Psalm 81:1-7