Verbmall has an interesting creation on the opposite of epiphany:
So, let me approach the question from an etymological perspective. An epiphany leads a person to a burst of internal light. We need a term to metaphorically express leading a person to a dark cave. Let’s save the epi-, meaning to, and let’s add the combining form -calyptry, from the Greek kalyptra, covered and hidden as by a veil.
Thus, we have epicalyptry [ep´-ee-cal-ip´-tree], deliberate concealment from self or resistance to insight. Spread the word, folks. Let’s get it into dictionaries.
While Urban Dictionary plumps for depiphany:
depiphany
an epiphany that has been forgotten.
"I just had the most brilliant idea ever!"
"What?"
"I forget."
"You had another depiphany?"
Although that's not exactly your interpretation.