Au contraire, my friend. It is a matter of faith, but SOME of us put faith in what we can learn by observation because our faith is in our ability to perform experiments or test hypotheses. You have faith because some religiously related event resonates within you and gives you that moment of religious fervor, of something that triggers your emotions, of something you consider profound. We have faith as well, but faith in what we can see repeatedly, faith in tests that we can perform, faith in things that we can analyze through reason.
You should remember the statement, "Only through faith can you come to me."
My question to YOU is, is there only one kind of faith? What is evidence for you doesn't have to be evidence for me. Belief is a funny thing because it is so personal. What triggers belief in you might have absolutely no meaning for me. (We've discussed that many times.)
The question will always be whether you can present evidence - and so far, all of the evidence has been either anecdotal or unsupported. All of the miracles in the Bible were observed by people who didn't understand the idea of corroboration. But here is the kicker...
OK, let's say that at least SOME of these miracles actually happened. Why did the public miracles stop? It has been over 2000 years since we had public miracles. Did God give up on us, decide we were not worthy of seeing Him in action? Are we that bad that we are now to be left with uncorroborated descriptions of things that supposedly happened, things that if they WERE real would give people the chance to have the faith that would come of actually witnessing those events? Remember, Jesus refused to berate "Doubting Thomas." Are you doing what Jesus wouldn't do?
I agree with you that people come to God, or could conceivably come legitimately to God, by many different ways, and by different flavors of 'faith'.
This is why CS Lewis is such a 'big deal' to Christianity in my opinion, he was called to evangelize to people who wanted a more logically evident train of thought. I truly wish you would read Mere Christianity, it's a heck of a book, you might enjoy the train of thought despite being an atheist. (Or the Problem of Pain, equally good book). I would consider a trade whereby I read something you want me to in exchange - but I recognize that that may be of no appeal, since you aren't really trying to evangelize me in the first place : ) But it would be an interesting thing to do regardless.
You may not know or perceive this, but I go to some lengths to find common ground between us, and in fact, I rejoice when I find it, as it's always nice to feel a friendly connection with someone.
For miracles stopping, a lot of religious people (your Lutheran ancestors included) tend to believe that miracles stopped with the disciples, for theological reaons I don't fully understand so won't try to quote. But in countries outside the US, public groups witnessing miracles is not uncommon. I put zero effort into quoting them here, for obvious reasons and I value my time. I'm not sure I would say Jesus refused to berate doubting Thomas; that may be true on the technicality of the word 'berate', but he did admonish him strongly.
I see the old testament as being more 'physical', and the new testament being more 'spiritual'. I don't agree with many of my current popular Christian evangelists that God promises physical prosperity to all Christians, for example. In fact I see it rarely discussed in the new testament, mostly the benefits Paul and apostles talk about are spiritual benefits - which of course (to me) are a plenty reason to be a Christian - joy, peace, love, eternal security, a sense of power through Christ, forgiveness, etc. etc. So theologically, I do think there is a switcharoo between the two time periods. God used to require people to atone for their sins through all kinds of physical means; but since Christ, it's a spiritual reconciliation with God that happens through belief rather than a bunch of physical sacrifices - and I feel that that switch from 'physical to spiritual' is possible b/c of the giving of the Holy Spirit to us, and it extends to a lot of subjects. God used to physically prosper people who belived in him, but now he spiritually prospers them. Blessed are they that believe without seeing - and the blessings are real, though, and overwhelmingly wonderful.
If it's all in our (Christians') imagination, then it's a hell of a technique that everyone might as well get on board with - it's that beneficial. Not that I think it is all in our imagination. I draw a parallel here to the society of AA - many people who didn't believe in a higher power agreed to do so , or try to be open to doing so, on the basis of "it works and you need it". They did so and got well and stayed sober - by the hundreds of thousands, if not more. Some things are worth it even if you aren't sure by physical evidence. Of course this is the 'happy path' of Christianity; there are plenty of Christians abusing the faith for power, sex, money, fame etc.....but Jesus didn't say "follow my followers". He said "Follow Me".