A s long as we live in this side of eternity, our intellect/ mind is a CORRUPTED agent and without God’s aids our mind is useful only for lying and to commit acts of sins.
The Council of Sens (1140) condemned the idea that free will is sufficient in itself for any good. Donez., 373.
Council of Orange (529)
In canon 20, entitled hat Without God Man Can Do No Good. . . Denz., 193; quoting St. Prosper.
In canon 22, says, “ No one has anything of his own except lying and sin. Denz., 194; quoting St. Prosper.
Fundamentals of Catholic Dogma by Ludwig Ott;
For every salutary act internal supernatural grace of God (gratia elevans) is absolutely necessary, (De fide).
There is a supernatural intervention of God in the faculties of the soul, which precedes the free act of the will, (De fide).
St. Thomas teaches that all movements of will and choice must be traced to the divine will: and not to any other cause, because Gad alone is the cause of our willing and choosing. CG, 3.91.
St. Thomas (C. G., II, xxviii) if God’s purpose were made dependent on the foreseen free act of any creature, God would thereby sacrifice His own freedom, and would submit Himself to His creatures, thus abdicating His essential supremacy–a thing which is, of course, utterly inconceivable.
The Mystery of Predestination by John Salza. Page 84.
St. Thomas properly explains the chain of causality:
"It is to be observed that where there are several agents in order, the second always acts in virtue of the first: for the agent moves the second to act.
And thus all agents act in virtue of God Himself: and therefore He is the cause of action in every agent. ST, Pt I, Q 105, Art 5.
Because God is the cause of action in every agent, even man’s free will determination to do good comes from God."
308 The truth that God is at work in all the actions of his creatures is inseparable from faith in God the Creator.
God is the first cause who operates in and through secondary causes:
"For God is at work in you, both to will and to work for his good pleasure."171
Far from diminishing the creature’s dignity, this truth enhances it.
2022; “The divine initiative in the work of grace precedes, prepares, and elicits the free response of man. Grace responds to the deepest yearnings of human freedom, calls freedom to cooperate with it, and perfects freedom.”
St. Thomas teaches that God effects everything, the willing and the achievement. S. Th.II/II 4, 4 ad 3:
As we see above, there are two agents God and still our corrupted intellect/ mind.
But only One Agent runs the show, God Almighty the Supreme Ruler of the Universe.
His wisdom He so decreed/ orders from all eternity EVERY event within the universe, He directs all, even evil and sin itself, to the final end for which the universe was created.