Albert Barnes' Notes on the Whole Bible - Psalms 80:18
So will not we go back from thee - That is, if thou wilt thus interpose; if thou wilt deliver the nation; if thou wilt help him whom thou hast placed over it, giving him wisdom and valor, we will hereafter be obedient to thy law; we will not apostatize from thee. It is a solemn promise or pledge of future obedience made by the psalmist as expressing the purpose of the people if God would be merciful and would withdraw his judgments; a pledge proper in itself, and often made by the Hebrew people... read more
The Pulpit Commentary - Psalms 80:18
God's grace our best safeguard. "So will not we go back from thee." This assurance implies that the people, in whose name the psalmist speaks, had fully learned the lesson which God designed to teach them by the withdrawal, which was chastisement, and involved bitter distress and humiliation. They had turned to God, and God had turned, in mercy and in restoring grace, to them. The issue of bitter experience was, that the people desired to be steadfast servants of God henceforth. Compare... read more