At the Huffington Post yesterday, Jason Derr referred to a book that sounds interesting:
In her book Wisdom and Metaphor poet and philosopher Jan Zwicky argues for a poetic form of doing philosophy, one rooted in an understanding of metaphor. As she sees it, metaphor teaches us to see “X (as Y) and at the same time X is not Y.” In her introduction she says we are not wise in a vacuum but are wise about things: people, situations and contexts. People who think metaphorically think truly, as their thinking follows the shape of the world. Zwicky says that metaphor, as a philosophical device, is a form of seeing-as.
Prometheus Unbound 