In the text 4, the poem uses the metaphor to express:

Text 4

Hope is the thing with feathers

(Emily Dickinson 1830 –1886)

Hope is the thing with feathers

That perches in the soul,

And sings the tune without the words,

And never stops at all,

And sweetest in the gale is heard;

And sore must be the storm

That could abash the little bird

That kept so many warm.

I've heard it in the chillest land,

And on the strangest sea;

Yet, never, in extremity,

It asked a crumb of me.

* This poem is in the public domain. Available in:< https://poets.org/poem/hope-thing-feathers-254>