Only In Metaphor: Parable

Question: Are there examples of practical uses for speaking mostly in metaphor?

Why yes, I think so. While pondering over metaphor, I realized that metaphors are incredibly useful in being cryptic and secretive. It occurred to me that secret protection agencies use metaphors when they announce the stereotypical "the eagle is in the nest." I'm sure that there have been several books which are written purely in metaphor to avoid detection. The Bible is one example that occurred to me. Jesus, from what I know, spoke largely in parable. This is primarily because he wanted to spread his message nut he could not do so in a direct way due to the oppressive nature of the Roman Empire. Had he tried to convey his message out-right, without the help of metaphor, he may have very well been put to death long before he was, long before he had the chance to tell more parables. Additionally, telling a story in metaphor form will likely cause your audience to better remember the central message, even if it conveys the message no more clearly that direct language; Even if the message is slightly less clear to the general public, any message that they do get, they will better remember.

I suppose the problem with speaking mostly in metaphor is that many people will interpret the metaphor to mean many different things. Sometimes the new interpretations could be very well opposed to your original meaning; the bible is once again evidence of this.