religious visions => [hiero-] (Greek) meaning 'sacred' or 'holy'.
pathological religious visions or delusions
<psychiatry> An obsolete term for pathologic religious fervor characterised by delusions with a religious content. ... Origin: G. Hieros, holy, + mania, insanity ... (05 Mar 2000) ... 
hieromania 1. Religious insanity; a pathologic religious fervor characterized by delusions with a religious content. 2. Pathological religious visions or delusions. 3. An abnormal interest in priests.