@Jazzle,
Be careful around Freud, some of the external agenda juxtapositions of his work fail to reason ethically with mass published receptions results.
To answer your question though, I think personally, you would find some success in researching the nature of 'visions' IE: virgin mary.... Then selecting key factor assertions from the work/s you choose and linking it to hallucinations, with noted alternates as cited 'plausible' under a God.
What would be astounding however is an open ended work which left people with a new concept they had not heard before, that choice is left with the reader. That may not mean a 'lie' it may mean, a slightly different interpretation.