The mysteries of heaven must not be revealed; used to express that something is a profound secret or that one is not at liberty to disclose information

literally meaning "mysteries of heaven must not be revealed"; used as an idiom to say that one is not at liberty to inform someone about a secret or that a matter must be kept strictly confidential

to divulge the will of heaven; to let the cat out of the bag regarding a secret that should not have been told

Literally refers to silk fabrics that are brilliantly colored and surpass human craftsmanship; metaphorically used to describe poetry or prose that is naturally composed and beautifully written.

(idiom) to divulge a secret that should not have been revealed; literally to disclose the will of heaven

(idiom) to divulge the will of heaven; to leak a crucial secret that should have been kept hidden