Whether a Man May Merit Anything from God?
Objection 1: It would seem that a man can merit nothing from God. For no one, it would seem, merits by giving another his due. But by all the good we do, we cannot make sufficient return to God, since yet more is His due, as also the Philosopher says (Ethic. viii, 14). Hence it is written (Lk. 17:10): "When you have done all these things that are commanded you, say: We are unprofitable servants; we have done that which we ought to do." Therefore a man can merit nothing from God. Objection 2: Further, …
Saint Thomas Aquinas—Summa Theologica

Whether Beneficence is an Act of Charity?
Objection 1: It would seem that beneficence is not an act of charity. For charity is chiefly directed to God. Now we cannot benefit God, according to Job 35:7: "What shalt thou give Him? or what shall He receive of thy hand?" Therefore beneficence is not an act of charity. Objection 2: Further, beneficence consists chiefly in making gifts. But this belongs to liberality. Therefore beneficence is an act of liberality and not of charity. Objection 3: Further, what a man gives, he gives either as being …
Saint Thomas Aquinas—Summa Theologica

Whether a Human Action is Meritorious or Demeritorious Before God, According as it is Good or Evil?
Objection 1: It would seem that man's actions, good or evil, are not meritorious or demeritorious in the sight of God. Because, as stated above [1202](A[3]), merit and demerit imply relation to retribution for good or harm done to another. But a man's action, good or evil, does no good or harm to God; for it is written (Job 35:6,7): "If thou sin, what shalt thou hurt Him? . . . And if thou do justly, what shalt thou give Him?" Therefore a human action, good or evil, is not meritorious or demeritorious …
Saint Thomas Aquinas—Summa Theologica