Psalms 71:13

In the psalm he exclaims: “Defend the fatherless and the needy; do justice to the humble and the poor; deliver the poor, and rid the needy out of the hand of the wicked.” Similarly in the seventy-first Psalm: “In righteousness shall He judge the needy amongst the people, and shall save the children of the poor.” And in the following words he says of Christ: “All nations shall serve Him.” Now David only reigned over the Jewish nation, so that nobody can suppose that this was spoken of David; whereas He had taken upon Himself the condition of the poor, and such as were oppressed with want, “Because He should deliver the needy out of the hand of the mighty man; He shall spare the needy and the poor, and shall deliver the souls of the poor. …

15. But it might occur to one; if because of sins man was held by the devil, have sins pleased Christ, who saved the needy man from the mighty? Far be it. But “He it is that shall spare the helpless and poor man” ( ver. 13 ): that is, shall remit sins to the man, humble and not trusting in his own merits, or hoping for salvation because of his own virtue, but needing the grace of his Saviour. But when he hath added, “and the souls of the poor He shall save:” he hath recommended to our notice both the aids of grace; both that which is for the remission of sins, when he saith, “He shall spare the poor and needy man;” and that which doth consist in the imparting of righteousness, when he hath added, “and the souls of the poor He shall save.” For no one is meet of himself for salvation (which salvation is perfect righteousness), unless God’s grace aid: because the fulness of the law is nough …

16. “From usuries and iniquity He shall redeem the souls of them” ( ver. 14 ). What are these usuries but sins, which are also called debts? But I think they have been called usuries, because more of ill is found in the punishments than hath been committed in the sins. For, for example’s sake, while a man-slayer killeth only the body of a man, but can no wise hurt the soul; of himself both soul and body is destroyed in hell. Because of such despisers of present commandment and deriders of future punishment hath been said, “I coming would have exacted with usuries,” from these usuries are redeemed the souls of the poor by that blood which hath been shed for the remission of sins. He shall redeem, I say, from usuries, by remitting sins which owed larger punishments: but He shall redeem from iniquity, by helping them by grace even to do righteousness. …