Ps 83:6

“"For the lawgiver will give a blessing." Somebody may ask, "Why in the valley of tears, in the place that God has set for the contest—or for the conflict—why has he placed us as athletes? Why has he willed us to fight?" The psalmist gives the answer: He has willed that this place be set for us as an arena that he may reward our victory with a crown. "For the lawgiver will give a blessing." This Lawgiver, our president of the contest, has willed us to contend only that he may bless us. Just consider what the victory means! What are the blessings of this Master of the games? "They go from strength to strength";6 they win the victory here that they may receive the crown there. If a person of courage gives evidence of strength here, there he becomes stronger. "They go from strength to strength"; hence, unless we are strong here, we cannot have greater strength there. The psalmist did not say, they shall go from weakness to strength, but from strength to strength. Do you want to be a person of fortitude there? Then be one here first. Do you want to be crowned there? Fight here.”

“What then does God supply by His grace to him whom He taketh hold of to lead him on? He goes on to say: "He hath placed steps in his heart." ...Where does it place steps? "In his heart, in the valley of weeping" (ver. 6). So here thou hast for a winepress the valley of weeping, the very pious tears in tribulation are the new wine of those that love. ...They went forth "weeping," he says, "casting their seed." Therefore, by the grace of God may upward steps be placed in thy heart. Rise by loving. Hence the Psalm "of degrees" is called. ..."He hath placed steps of ascent to the place which He hath appointed" (ver. 7). Now we lament; whence proceed our lamentations, but from that place where the steps of our ascent are placed? Whence comes our lamentation, but from that cause wherefore the Apostle exclaimed that he was a wretched man, because he saw another law in his members, warring against the law in his mind? And whence does this proceed? From the penalty of sin. And we thought that we could easily be righteous as it were by our own strength, before we received the command; "but when the command came, sin revived; but I died," saith the Apostle. For a law was given to men, not such as could save them at once, but it was to show them in what severe sickness they were lying. ...But when sin was made manifest by the law given, sin was but increased, for it is both sin, and against the Law; "Sin," saith he, "taking occasion by the command, wrought in me all manner of concupiscence." What does he mean by "taking occasion by the law"? Having received the command, men tried as by their own strength to obey it; conquered by lust, they became guilty of transgression of this very command also. But what saith the Apostle? "Where sin abounded, grace hath much more abounded;" that is, the disease increased, the medicine became of more avail. Accordingly, my brethren, did those five porches of Solomon, in the middle of which the pool lay, heal the sick at all? The sick, says the Evangelist, lay in the five porches. In the Gospel we have and read it. Those five porches are the law in the five books of Moses. For this cause the sick were brought forth from their houses that they might lie in the porches. So the law brought the sick men forth, but did not heal them: but by the blessing of God the water was disturbed, as by an Angel descending into it. At the sight of the water troubled, the one person who was able, descended and was healed. That water surrounded by the five porches, was the people of the Jews shut up in their law. The Lord came and disturbed this people, so that He Himself was slain. For if the Lord had not troubled the Jews by coming down to them, would He have been crucified? So that the troubled water signified the Passion of the Lord, which arose from His troubling the Jewish people. The sick man who believeth in this Passion, like him who descended into the troubled water, is healed thereby. He whom the Law could not heal, that is, while he lay in the porches, is healed by grace, by faith in the Passion of our Lord Jesus Christ. ...”