Posted in Writing

The Purpose of Metaphor.

What is the purpose of a metaphor? I was taught that memories are like signposts for stories. They are points on a road that connects ideas. This is especially useful when writing fiction because a well chosen metaphor can bridge the gap between reality and fantasy. First talk about something about in the fictional world and use a metaphor to tie it, with a strong knot, to something the reader understands, so that it draws them more deeply into the narrative. It is possible, however, to use to many metaphors. You bog down the story and the audience becomes board. How do I strike the proper balance between action and exposition?
Any ideas?