Believer says: To know there's a God is to feel there’s a God. That’s how you know; you feel it.
But skeptic says: Some people have a feeling that there’s a God. But the question is whether a feeling it's evidence for one. People experience the feeling in every religion; so all gods must exist. I jest of course.
Besides, say people have a strong feeling there’s no God. So by the same token, they’re right. Where do we go from there?