tune without the words
Hope offers comfort without promising a specific outcome. A wordless song can also be understood or felt by anyone.
https://www.poetryfoundation.org/video/77372/hope-is-the-thing-with-feathers Hearing the poem read aloud helped me notice its gentle, song like rhythm. That connects to Dickinson’s image of hope as a bird whose song has no words. The voice carries a feeling of comfort even without explaining exactly what hope will bring.