need help!!!! can you help me with the theme of this poem Anne Frank huis by Andrew Motion????

I think
the dominant theme is liberty. The poem says that those looking at the pictures above Anne's bed
find "not only patience missing its reward," but "one enduring wish for chances
like my own: to leave as simply as I do..." and walk through Amsterdam. The kind of liberty
Motion is talking about is as simple and basic as it gets, but it was a reward that was denied
to Anne and her family despite their patience. The last stanza of the poem seems to speak to his
recognition of the difference between his life and hers, and it obviously struck a nerve with
him.