Answer:
The metaphor suggests that readers should explore poems in depth.
Step-by-step explanation:
The extract from "Introduction to Poetry" by Billy Collins. or walk inside the poem's room and feel the walls for a light switch.The metaphor recommend that readers should explore poems in depth, that metaphor from the excerpt suggest to readers to deeply scrutinize or inquire into poems,
Billy message to readers is that readers should be patient,calm and unprejudiced or unbiased whenever they are reading poems so that they will see and grasps the meaning, yet not over-analyse it.
William James "Billy" Collins who was born March 22, 1941 is a known American poet, appointed as Poet Laureate of the United States of America from the year 2001 to 2003. He is also a prominent Professor at Lehman College of the City University of New York,he retired in the year 2016.
Billy Collins was acknowledged as a Literary Lion of the New York Public Library in 1992 and was also chosen as the New York State Poet for 2004 through 2006.