What is the origin of the idiom "beyond the veil" and when to use it?

The idiom "beyond the veil" is rooted in a metaphorical use of the word "veil" rather than a specific historical origin. A veil, in this context, symbolizes a barrier or separation between two realms or states of existence. The idea of a veil representing a boundary between the known and the unknown, the physical and the spiritual, or the present and the afterlife is a common theme in various cultures and religions. This expression is typically used to refer to something that is hidden, mysterious, or beyond ordinary understanding.