I think this single line has more gravity than the core of the universe. Mary Oliver beautifully pens down how sometimes what we think as our limitation is our strongest source of power.
You can also download the collection of all the poems and proses in one book "The Journey Inwards — Collected Poems & Proses" as mobi (for kindle), epub (for Apple iBooks), or pdf for free. There is a poem or prose you love? You can send me a Tweet.