I have a lot of time for the idea that God could reveal himself to people in such a way that they know.
It’s a bit like experience. You can make all kinds of statements up in your head but you know (don’t you?) what statements correspond to what you experience.
Not that your experience necessarily corresponds to an external reality; but that you know that your statement about what you are experiencing is about what you are experiencing.
But if someone never had that experience and heard your statements they would not be able to verify it for themselves.
It could be the same with the god thing. People could have that experience and other people who don’t wouldn’t be able to verify it.
It could be from this that famous quotes like “Those that don’t know speak those that do know don’t speak” come from.
And like how our statements about what we experience can be erroneous but never-the-less statements about the experience so can the statements people who have epiphanies make be erroneous.
They could muddy the experience by trying to make what they experience fit their preconceived ideas about morality.