Came to mind,
D⨁GⅢA which stylized letters appropriately introduce believers to architecture elements of gothic churches.
AL(|)ENS pictures a scary eyelid awakening reptilian-brain fears.
Ah, and also Fellini's
8½ where he can't find an idea to complete the scenario of his half finished movie.
(and honest, I resisted Googling for zillion of suggestions already answering the thread).