Grace can never be necessitated by logical argument, since if it could then it would be logically necessary, and so wouldn’t be Grace (and Christ would never have needed to die on the Cross, and Paul would never have written “Where is the philosopher of this age? Has not God made foolish the wisdom of the world?” (1 Cor 1).
Difficult to follow this argument (if it is one). Grace is logically necessary.
• God is omnibenevolent
• The omnibenevolent will to bind with their beloved
• All goodness (grace) comes from God
• God creates man with original grace
• Man lost original grace. Death enters creation
• Man’s condition is so utterly hopeless that he cannot save himself
• “And if he is not one of us, he cannot save us”
• Incarnation
• Christ, the God-man, conquers sin and death by his cross and resurrection
• God wills all man to come to salvation, to return to original grace
• God provides grace
But all of the above aside, in my experience the gospel is a lot more persuasive than these dry philosophical arguments, but perhaps I’m with a different crowd

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Catholics reject both scientism and fideism. Because reason and science both tell us about our Creator, one enforces the other. And since God is the source of faith, reason and science; they must be in accord when properly understood.
Sounds as if we’re on the same page here, and, so I think is the Catholic priest who originated the big bang theory, Monsignor Georges Lemaître:- “He (the Christian researcher) knows that not one thing in all creation has been done without God, but he knows also that God nowhere takes the place of his creatures. Omnipresent divine activity is everywhere essentially hidden. It never had to be a question of reducing the supreme Being to the rank of a scientific hypothesis.” -
catholicculture.org/culture/library/view.cfm?recnum=8847
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And to prove that quote isn’t out of context, Lemaître also said, speaking of his big bang hypothesis: “As far as I can see, such a theory remains entirely outside any metaphysical or religious question. It leaves the materialist free to deny any transcendental Being. He may keep, for the bottom of space-time, the same attitude of mind he has been able to adopt for events occurring in nonsingular places in space-time. For the believer, it removes any attempt at familiarity with God, as were Laplace’s “flick” or Jean’s “finger [of God agitating the ether]” consonant, it is consonant with the wording of Isaiah’s speaking of a “Hidden God,” hidden even in the beginning of creation.”
These quotations are
out of context. To be “essentially hidden” is not to be entirely hidden. From the same article:
"Lemaître goes on to say, “It does not mean that cosmology has no meaning for philosophy. Philosophy and theology, when kept in isolation from scientific thought, either change into an outdated self-enclosed system, or become a dangerous ideology.”
“Reaching out this time to his fellow churchmen, Lemaître said, ‘Does the Church need Science? Certainly not. The Cross and the Gospel are enough. However, nothing that is human can be foreign to the Christian. How could the Church not be interested in the most noble of all strictly human occupations, namely the search for truth?’”
Knowing that Christ never appealed to any cosmological scheme to support his teaching, Lemaître also knew that theology and cosmology relate if, and only if, cosmology attains certitude in its findings. Since that cannot happen, modern theologians do not make their theology dependent on the latest cosmological hypothesis. Nor do cosmologists claim their findings have the certitude of faith.