Charles H. Spurgeon on Psalms 85:8

But let them not turn again to folly. If God did not in the end speak peace, they would indeed return to folly. For his end of speaking peace is, that they might not return to folly: Ps 125:3, "The rod of the wicked shall not always be upon the righteous, lest they put forth their hand to iniquity; "therefore, at the last verse, "peace shall be upon Israel." As it is a rule in physic still to maintain nature, and therefore when that shall be in hazard to be destroyed, they leave giving purging physic, and give cordials; so doth God with his people: though with purging physic he often brings their spirits very weak and low, yet he will uphold and maintain their spirits, so as they shall not fail and be extinguished, but then he will give cordials to raise them up again. Thomas Goodwin.