Radak

Psalm. This psalm is spoken about the perplexity of the children of the world regarding the peace of the wicked and the suffering of the righteous in this world. This poet Asaf speaks about his own tongue or the tongue of every fool: He says, "Surely God is good to Israel." Even though they are in exile, God is good to them and will continue to preserve their good deeds. It is also good for those with a sincere heart among the other nations, even though they experience evil in this world, they will have goodness in the world to come. And the meaning of "surely" is that I truly know what will happen, for He will still bestow goodness upon them.