Complete Commentary on the Whole Bible, by Matthew Henry, at sacred-texts.com
(Psa 79:1-5) The deplorable condition of the people of God.
(Psa 79:6-13) A petition for relief.
God is complained to: whither should children go but to a Father able and willing to help them? See what a change sin made in the holy city, when the heathen were suffered to pour in upon them. God's own people defiled it by their sins, therefore he suffered their enemies to defile it by their insolence. They desired that God would be reconciled. Those who desire God's favour as better than life, cannot but dread his wrath as worse than death. In every affliction we should first beseech the Lord to cleanse away the guilt of our sins; then he will visit us with his tender mercies.
Those who persist in ignorance of God, and neglect of prayer, are the ungodly. How unrighteous soever men were, the Lord was righteous in permitting them to do what they did. Deliverances from trouble are mercies indeed, when grounded upon the pardon of sin; we should therefore be more earnest in prayer for the removal of our sins than for the removal of afflictions. They had no hopes but from God's mercies, his tender mercies. They plead no merit, they pretend to none, but, Help us for the glory of thy name; pardon us for thy name's sake. The Christian forgets not that he is often bound in the chain of his sins. The world to him is a prison; sentence of death is passed upon him, and he knows not how soon it may be executed. How fervently should he at all times pray, O let the sighing of a prisoner come before thee, according to the greatness of thy power preserve thou those that are appointed to die! How glorious will the day be, when, triumphant over sin and sorrow, the church beholds the adversary disarmed for ever! while that church shall, from age to age, sing the praises of her great Shepherd and Bishop, her King and her God.