This typically simplistic poem by Frost, like so many of his poetic works, has much depth to it as we begin to probe its meaning and the ideas behind it. When we think of imagery we think about the way in which authors create verbal pictures of what they are trying to describe through their words, normally by appealing to the five senses. This poem is built around two implied metaphors that relates fire to desire and ice to hatred, and explores the similiarities beween them.
Note the strong visual element in "Fire and Ice." We are presented with very strong images pertaining to both of these elemental states. Note the following example:
From what I've tasted of desire
I hold with those who favour fire.
The idea of "fire" presents both an image that appeals to our sense of sight, but also our sense of feeling, too. Likewise, note the way that the speaker has "tasted" desire, another sense. The images in this poem therefore present us with strong, vibrant pictures that appeal to our senses and help us to imagine what the author is describing.