I have never physically been to France.
I have read a lot about it. Many things have occurred there. I have met French people. I have friends who have been there. But I have no direct evidence of the existence of France other than the things I read, hear, the maps I see, the people I meet. As far as I am concerned the existence of France could be a conspiracy of the entire world for my benefit.
But why would the world conspire to make me believe its existence? For what reason? Sure, I can go and check. It isn’t that hard. The “French” I have met, if they are not French, surely came from somewhere else. Perhaps they are a people of compulsion to lie collectively. Why?
It doesn’t need to be France. It could be some other place. There are many places I have not been to. But I can go there and check. Korea, for example, is a short plane’s ride. Finances and time willing I can go (it is within my means).
The act of checking and the the ease of such checks surely tells us about the nature of reality and the nature of secondary sources. I have no reason not to believe someone that they come from France, or have been to France. Many a time I have experienced something they have not. Pretty much my life before I came to Japan is a mystery to my children and wife. I tell them about it. They believe it. There is no good reason to lie about it. It is mundane as mundane can be.
The question of God’s existence is a little different.
No amount of wanting to check will bring me to God. God is not anywhere (though it is claimed God is everywhere). I cannot find God except with in thought and name. That is not to deny God’s existence, but rather to say what I know of God.
I know God as thoughts and name as much as I know France as thoughts and name. While I can check France’s existence I cannot check for God’s. Fundamentally France and God are different. One is a concept of a place. The other is a concept of a concept. I’ll let you decide which is which.
But still we talk of God as much as we talk of France, if not more. No amount of talk will allow me to go check of God’s existence. Buying a plane ticket will.
If I want to see God I am told go to a church. But when I get to the church I do not see God but only a church. If I want to know about God I am told go read the Bible. But when I read the Bible I do not know God but only the Bible.
This is true of all other religions, philosophies, sciences. There is a difference between first-hand knowledge (experience) and second-hand knowledge (reading, hearsay). Check for yourself when possible. Be weary of indirect sources. Do not confuse the two.