I always post that we all know in part. We are sinners in process. I think you are wrong to imply that Calvinists think they know all the answers.
This seems more like Agnosticism than Christianity, to me.
What is the basis for Calvinism’s existence, if it doesn’t claim to know anything? Why did Calvin bother to become a Calvinist? Why Calvinist, and not Lutheran, Mennonite, or Anglican, if he had a beef with the Catholic Church?
I don’t know any Christians throughout church history who claimed to know everything.
But surely, it’s important to know
something? Calvinists say that Baptism is an Ordinance; surely they have a
reason for saying so? You can’t just say, “Well, it’s okay to disagree whether Baptism is an Ordinance, or a Sacrament, because we just can’t know.” Why bother, then? Why not just go with the ancient belief that Baptism is a Sacrament, instead of going to all that trouble to assert that it’s actually an Ordinance, if we can’t really know for sure, and it doesn’t really matter, anyway?
There is great tension for all Christians who try to discern the essentials from the secondary issues.
And how does one discern what the secondary issues are? Do we just say, "Well, this is something that sincere Bible believers disagree on. It’s not clear from Scripture Alone, but rather than say, “Okay, maybe there’s something wrong with the premise of Scripture Alone,” instead we can say, “Well, since we don’t understand it, it’s a non-essential.” Even though it has an impact on individual salvation - because
if it turns out that Baptism is actually a Sacrament, then everyone who thought it was only an Ordinance, and didn’t bother to baptize their kids, is going to be in deep trouble come Judgement Day.
Contending for the faith is a command. I don’t think the contents of the gospel are secondary issues. I will put you on the spot. Do you think the official Roman Catholic gospel is different than the gospel thay you proclaim and have hope in? Why or why not?
The “official Roman Catholic Gospel” is that we are saved by grace working in faith through love. This is what I believe. Therefore, I see no difference between what I believe, and “the Roman Catholic Gospel,” nor do I see any reason why I would want to believe differently.
