What is an example of a metaphor in poetry?

A metaphor in poetry is a figure of speech that makes an implicit comparison between two unlike things that actually have something in common. For example, in William Wordsworth's poem "I Wandered Lonely as a Cloud," the poet compares the daffodils to stars, saying, "I wandered lonely as a cloud / That floats on high o'er vales and hills, / When all at once I saw a crowd, / A host, of golden daffodils." In this metaphor, the daffodils are compared to stars because they are both seen as beautiful and numerous. The metaphor helps to create a vivid image in the reader's mind and adds depth and complexity to the poem.