You don't have to memorize the 73rd Psalm, but I highly recommend you know what it teaches and where to find it. Asaph considered the wicked, and his "steps had nearly slipped." He was "envious of the arrogant." Asaph looked at the evil people of the world and was convinced they were better off than he was. They seemed to be affluent and well-fed. They seemed to have all they desired, with no lack. Asaph, for a moment, wanted to be like them, until he remembered their end and his own. The wicked are set in slippery places and brought to destruction. God will bring the righteous into his gracious presence. God himself is the portion and blessing of the righteous. We, too, can forget the end of the story and be momentarily jealous of the apparent ease of the lives of the wicked. But we must hold fast to what we know of Jesus, righteousness, and his return. We must put all of our hope on the return of Christ, knowing that our suffering in this day and age pales in comparison to the glory that will be revealed to us on the day Jesus returns.