Illustrating poems

I decided to do my paper on the combination of poems and illustrations. I think that this is a unique approach to painting with words because poems can be expanded in two directions: first, poems are meant to be read aloud (excluding concrete poems), as well as read silently. Reading poems aloud adds to their effect. Second, poems can be augmented with illustrations. This expands on their visual aspect, not only the length of lines and quality of words, but also the visual images that the poems present.

William Blake's poems are interesting to look at, because he was an artist as well as a writer. Here's one of his poems from Song of Innocence and Experience, called "The Tyger." Here, his illustrations enhance the poem because they add to the general dark mood, with the red-eyed tiger, sharp, thin branches, and dim colors.

When interpreting someone else's poems, the process is different. What would you suggest as a strategy for doing this?