Read the excerpt from "Introduction to Poetry" by Billy Collins.

"or walk inside the poem's room
and feel the walls for a light switch."

How does this metaphor reveal Collins’s message?

The metaphor suggests that poetic themes are serious and dark.
The metaphor suggests that readers should explore poems in depth.
The metaphor insists that readers should move about while reading.
The metaphor insists that one must know the poet to understand the poem.