Come In by Robert Frost 
 As I came to the edge of the woods,
 Thrush music—hark!
 Now if it was dusk outside,
 Inside it was dark.
 Too dark in the woods for a bird
 By sleight of wing
 To better its perch for the night,
 Though it still could sing.
 The last of the light of the sun 
 That had died in the west
 Still lived for one song more
 In a thrush's breast.
 Far in the pillared dark
 Thrush music went— 
 Almost like a call to come in
 To the dark and lament.
 But no, I was out for stars:
 I would not come in.
 I meant not even if asked, 
 And I hadn't been.
 25. What is the theme of "Come In" and how is it conveyed?