The Psalmist is carefully teaching the way to be faithfully delivered from trials is to always be aware of our ethical responsibility to properly care for the weak. I do not think any responsible person is capable to go though active life without being given the rare privilege of giving yourself for someone else who is not completely healthy. This Psalm is teaching our lives are provided because we have others we carry. God has covenanted and sworn to tell the truth to carefully gather all of our specific needs. He promised faithfully to never leave or forsake us. You positively identify in this Psalm a kind person in the first part extols the virtues of aiding other people but at the same time he invariably speaks curses. 10 But you, O LORD , have mercy on me; raise me up, that I may repay them." The Psalmist is teaching the covenant mentality of life. Showing how tenaciously God acts toward us to faithfully keep the eternal covenant. In this proper sense the most problematic thing in life remains the considerable value of sacred word. It is through Gods covenant we learn there is nothing we merely perform that is pleasurable unless it is positively received in the extraordinary boldness of reasonably arguing on Gods covenant. In our standard view it is effortless to merely bear everything we maintain for granted. We naturally devalue everything by imperfectly appreciating charitable Gods work in diligently pursuing us. This is why we do not get passionate about possible things that do not profit us. The valuable times where our considerable losses for others realistically are our greatest gains. Because we do not perceive life through the lens of eternal covenant. This is what the Palmist is earnestly advising. The brutal world is teeming of covenant breakers. Gods is carefully gathered to the weak and helpless by the eternal covenant. God is graciously pleased with Himself according to His own work that needs no outside help. This is why Gods most valuable trophies are those who cannot help or satisfactorily prove their unique value. This spirit of self-determination and self-confidence represent the specific attitude that causes us to devalue Gods covenant. In the covenant motif everything we naturally possess and are faithfully followed from God in extraordinary abundance graciously according to Gods sublime and faithful word. It is this covenant conviction that naturally gives us an overflowing thankfulness and a distinct pleasure in God. We are most happy when we are free to naturally come to God empty handed and in frequent need of everything. On the one hand God is passionate about being exalted through apparent weakness and on the other hand He is extremely jealous of us and the potential dangers that we face. This is why the Psalm is both a sacred promise and a fulfilled curse.