For he shall be as a tree planted by the waters, and that spreads out its roots by the river, and shall not fear when the heat comes, but its leaf shall be green; and shall not be anxious in the year of drought, neither shall cease from yielding fruit.
Read Chapter 17
Augustine of Hippo
No, I say that either before the law, or in the time of the Old Testament, they were freed from sins, not by their own power, because “cursed is everyone who has put his hope in humankind,” and without any doubt those are under this curse whom also the sacred psalm notifies, “who trust in their own strength,” nor by the old covenant that gives birth to bondage … but I say that they were freed by the blood of the Redeemer, who is the one Mediator of God and people, the Christ Jesus. - "Against Two Letters of the Pelagians 1.12"
You have begun to love what is outside of yourself. You have gone outside of yourself. When a person’s love goes away from him toward things that are outside of him, he begins to become vain along with useless goods, and somehow to spend his substance like the prodigal son. He is emptied. He is poured forth. He becomes a beggar. However, we must not despair even of such people when they begin to repent. May God grant this to them: “He came to himself.” Now if he came to himself, he had gone outside of himself. Just as he remained in himself when he fell away, so he should not remain in himself when he fell away, so he should not remain in himself when he returns. Therefore, let him keep himself close to God. Let him deny himself so he will not fall again. What does to deny oneself mean? Let him not confide in his own strength, let him realize that he is human, and let him look to the prophetic word: “Cursed is the one who trusts in human beings.” - "Sermon 159.3"
Let no one deceive himself. Let none be misled. Only the Lord can grant mercy. Sins committed against him can be cancelled by him alone who bore our sins and suffered for us, by him whom God delivered up for our sins. People cannot be above God, nor can the servant by any indulgence of his own remit or condone the graver sort of crime committed against his Lord, for that would make the apostate liable to this further charge, he knows not the words of the prophet: “Cursed is the one who puts his hope in humankind.” It is our Lord we must pray to, it is our Lord we must win over by our penitence. For he has said he will deny the person who denies him, and he alone has received all power of judgment from his Father. - "The Lapsed 17"
He said to him, “Yes, sir. The long duration of my illness makes me desire health. But, desire it as I may, I have no one.” Do not lose heart, my good fellow, because you “have no one.” You have God standing by you. One who is at once man and God under different aspects, for both must be confessed. The confession of the humanity without the confession of the divinity is unavailing, or rather earns a curse. For “cursed is one who puts his trust in humankind.” - "Sermon on the Paralytic 6"
It may be said both of the Jews and of the heretics that they put their hope in humankind, for the messiah whom they believe to be coming is clearly not the Son of God but a mere man. The person of the church, in contrast, who puts faith in the Lord, hears this: “Know that the Lord himself is God.” Because he trusts in the Lord, he will be compared with a tree and will be the one of whom the first psalm sings: “He is like a tree that is planted by flowing waters, bearing its fruit in season; and its leaf does not wither.” Being transplanted on (or by) the waters refers to the various graces of the Holy Spirit. And sending its roots into the water (or by the stream) means that one receives abundance from the Lord. But we can also say that it may be us who were transplanted from the aridity of Judea into the eternal grace of baptism. It goes on to say that he will not fear when the heat comes, meaning either a time of persecution or the day of judgment, and that his leaf will remain gree...
For as it says in the psalm, “Those who sow in tears shall reap with shouts of joy,” so also in the gospel, those who sow in laughter, that is, because of joy, shall reap in tears. Long ago did the Creator set these things side by side: Christ, by not changing them but only giving them emphasis, has made them new. “Woe to you, when all people speak well of you.” That is what their ancestors used to do to the false prophets. No less does the Creator, by Isaiah, censure those who seek after the blessing and praise of people: “My people, those who call you blessed, lead you astray and upset the paths of your feet.” And in other terms he even forbids them to have any confidence in a person, and consequently not in human praise, as by Jeremiah, “Cursed is the one who trusts in humankind.” - "Against Marcion 4.16"