Sort:  

I have no faith but I understand that there are limits to human reasoning and intelligence. If something can't be explained then we can't say simply say it came from God or from magic but we can endeavor to explain it.

That would be true unless God revealed the explanation and proved it enough times to enough people.
Who defines what is enough? God, of course.
He wanted the proof to be just convincing enough that
those who want to find him will believe and
those who don't want to find him... won't.
No doubt he got the value of "enough" precisely right.

And on what basis do you know that "God revealed the explanation and proved it enough times to enough people."? It seems like he didn't do a very good job of letting the majority of the world's population for most of human history hear the gospel (in China, India, etc.) in the first place. How might you be convinced by something you have never heard? And why not just create the human race so that everyone believes in him the first place? Anyway, same old arguments :).

Sufficient information has been out there for over 3500 years. The proof is in the billions who have indeed believed. The main reason it hasn't been heard by the other billions is people not wanting to hear (and Christians not wanting to suffer enough to tell them). In the Internet Age there is no longer any excuse.

But even the Apostle Paul asked your same question 2000 years ago:

"Everyone who calls on the name of the Lord will be saved." How, then, can they call on the one they have not believed in? And how can they believe in the one of whom they have not heard? And how can they hear without someone preaching to them? And how can anyone preach unless they are sent? As it is written: "How beautiful are the feet of those who bring good news!" - Romans 10:11-13

And Isaiah 2700 years ago.

But not all the Israelites accepted the good news. For Isaiah says, "Lord, who has believed our message?" Consequently, faith comes from hearing the message, and the message is heard through the word about Christ. But I ask: Did they not hear? Of course they did: "Their voice has gone out into all the earth, their words to the ends of the world." - Romans 10:14-19