In what do you believe? This question is asking about in what things do you trust? To what things are you faithful? Answers for me would be democracy, my marriage, Jesus Christ.
It is a linguistic curiosity that believe can also mean you sort of know something. Who had the best record in baseball this year? I believe it was the Cubs. When we use believe to refer to a fact, a single condition that is or is not true, it means less than know.
Of course, fact play a part in moving us to believe in a world view like that listed in the first paragraph as well. Marriage is easiest. I have billions of tiny observations and experiences that have caused me to love my wife and think that she loves me. I submit that there is no single fact that if thought true, but found to be false would mean that I no longer believed in my marriage. Many facts could change things so that I no longer believed in my marriage, but it would be more profound than learning that a single fact was not true.
Is there any single fact that could shake my faith in Jesus Christ? Is there any single fact that would cause me to no longer believe in Jesus Christ?
It seems like there should not be any such fact that could undo my faith, right?