As gherkin notes, I'm not Catholic. I'm being intentional--or trying to be intentional, anyway--to speak in the terms of the aforementioned C. S. Lewis'
Mere Christianity, including making use of specifically Catholic language (i.e., cooperation with God's grace). As far as being confusing, gherkin, as well as Obi's point later, offers some helpful clarification. I'd only add that pretty much
any theological question you ask gets confusing once you start to dig very far at all into them. The "correct" answers, stated as propositions, are usually pretty clear. It's when you start asking what is under those propositions or how they all hold together that it starts to get more difficult. And so it is with your question. It's a simple one, but it's a lot easier to ask a simple question than it is to give a simple answer.
In any case, my only real point is that while there is a lot of truth in the claim that choosing the right path is rational, there's also a very real sense in which it isn't "rational" but rather spiritual. That isn't to say it's
irrational. It's to say that "the right path" is so much more than just solving a puzzle. We aren't gnostics, imagining that salvation comes by having the correct knowledge. Paul gets at this a bit when he writes, "Now we have received not the spirit of this world, but the Spirit that is of God; that we may know the things that are given us from God. Which things also we speak, not in the learned words of human wisdom; but in the doctrine of the Spirit, comparing spiritual things with spiritual. But the sensual man perceiveth not these things that are of the Spirit of God; for it is foolishness to him, and he cannot understand, because it is spiritually examined. But the spiritual man judgeth all things; and he himself is judged of no man" (1 Cor 2:12-15, DR). Or consider the words of Jesus: "The Jews therefore murmured at him, because he had said: I am the living bread which came down from heaven. And they said: Is not this Jesus, the son of Joseph, whose father and mother we know? How then saith he, I came down from heaven? Jesus therefore answered, and said to them: 'Murmur not among yourselves. No man can come to me, except the Father, who hath sent me, draw him; and I will raise him up in the last day. It is written in the prophets: And they shall all be taught of God. Every one that hath heard of the Father, and hath learned, cometh to me'" (John 6:41-45, DR).
As gherkin notes, this sort of thing is getting into Divine Providence, which by the nature of it isn't terribly penetrable by the intellect. The upshot, as noted earlier, is that you approach this (as I'm sure you are) with a sense of humility in which you are seeking God on His terms, not on your own. "Ask and ye shall receive, seek and ye shall find." I'm not nearly Catholic enough to suggest specific prayers, but I understand prayers to Mary are at least effectual in guiding those who seek to her Son. So understood, I think the Christian life is extremely rational and actually the most rational thing that there is. But it's not rationalistic. Do the hard work of studying and asking questions and trust (through prayer, especially) that God will guide you and provide you with more and more illumination. That's just the way it works.
Or, if I'm more confusing than not, ignore it all.
