2Apple
Whether God exists or not, regardless of whether a person has a positive or negative opinion about His existence, it is still faith, because NO ONE CAN ACTUALLY PROVE EITHER WAY.

And here, I disagree with you. Faith and opinion are different things, at least when it comes to worldview. Faith is something that motivates, gives rise to imperatives, determines the way of human life, and serves as a call to action. And not just external action. Believers, for example, pray, sometimes silently, so it's not visible externally. I also believe that God exists, but I can't be called a believer. It's just my opinion, based on my worldview. No matter how much you try to convince me, the concept of "believer" simply doesn't apply to me, because opinion is a matter of reason, of cold calculation, which, according to some of my internal observations, tells me about the existence of God. Faith, however, is a matter of the heart. "Where your treasure is, there your heart will be," as they say in the Gospel, if you've read it. That's not a bad saying, is it? P.S. And I'll add one more thing, I can't resist. If you had ever seen a truly believing person, you would never say that faith is like an opinion. You wouldn't even have to see them; just read about them! I recommend "Quo Vadis" by Sienkiewicz. He describes believers in a very contagious way.