"ultimately, since God is sovereign, salvation must depend solely upon His sovereign choice." - Presbyterian Website.
Now you wouldn't think that when a Baptist friend sent me a message at 3am concerned about his salvation that I would speak almost the exact same words to him, as a Roman Catholic. But I did. He was worried about whether baptism saved you or not because he encountered the sinister "Church of Christ" denomination account of regenerative baptism (as an aside, they really should get a new name, that's like calling your denomination "The Real Church").
I tried to explain that I thought it was necessary for you to be baptized but that both my brothers aren't -strangely the baptists I know go around calling baptism a meaningless ritual...maybe they should change the name to "The Church Formerly known as Baptists", anyway, he was worried and I showed him all the verses about Baptism for salvation (Jn 3:5, Mk 16.16, Acts 2.39, Gal 3.27, 1 Pet 3:21, etc) but being a smart kid he started talking about "baptism of the Holy Spirit" - I wanted to shout DAMN YOU CALVIN!!@#@. but I didn't .... strangely I did the opposite and started talking to him about what it means to be saved, and why he shouldn't be worried. I said something like "Ultimately it doesn't matter whether you're baptized or not, Salvation is God's free sovereign choice, it's his house, he decides who to let in (Mark Driscoll said that)" - I shocked myself - A papist pretty much quoting the WCF, it must've been because it was 3am.
The thing is, I -like St. Thomas Aquinas- believe in predestination, God's sovereignty, and while I believe people can choose, God already knows who's "in" and who is "out" and I don't think he arbitrarily elects some for 30 years and then unelects them, which is a strange thing Aquinas taught.
But here's where I think this latent Reformedness comes from for me. I was reading parts of Fr. Louis Bouyer's thoughts on Sola Gratia in "The Spirit and Forms of Protestantism" and he goes on and on about the "gratuitousness of salvation" (which is now one of my favourite phrases) and the fact that salvation is a free gift which is unmerited, etc. So I was just linking the two doctrines I guess.
I had a 2 hour argument with my Dad about justification on Saturday (again) and he just doesn't understand how a Catholic who believes works are a fundamental part of salvation can have any assurance or trust in God, because they're "buying their way into Heaven" (a concept Kreeft decimates). I don't think my salvation has anything to do with me, just because my justification is intrinsic - within me - doesn't mean it's within my power. It's "God working in you" (Php 2:13).
I guess the thing I have in common with Calvin - probably the reason I like him as much as I still do - is that I believe the question of Salvation is a question of God's character. I have a friend named Dan and if I was in prison or in trouble he'd come and bail me out or help me. Dan is just a finite human, and I can trust him for my temporal salvation in situations. God on the other hand is "mighty to save", he has "loved me with an everlasting love", he is the one who saved me while I was yet a sinner (Rm 5:8) and I have full faith that he will save me in the end. For St. Paul says:
"And those whom he predestined he also called; and those whom he called he also justified; and those whom he justified he also glorified." (Romans 8:30 - also note the word Sanctified which Calvin championed in his distinction isn't even present).
and finally I will quote the great catholic council of Orange which as a Catholic I adhere to:
"[W]e are obliged, in the mercy of God, to preach and believe that, through sin of the first man, the free will is so weakened and warped, that no one thereafter can either love God as he ought, or believe in God, or do good for the sake of God, unless moved, previously, by the grace of the divine mercy . . . . Our salvation requires that we assert and believe that, in every good work we do, it is not we who have the initiative, aided, subsequently, by the mercy of God, but that he begins by inspiring faith and love towards him, without any prior merit of ours."
I guess that's what I was saying to my friend, that God will save him, because God has chosen him, and elected him. But that still sounds like a lapse into Reformed theology heh.