Saint Francis and the Sow by galway Kinnell

Now what I take from Saint francis and the Sow is inner expression which is lock up and wants to be express. now what makes me feel this way is the stanza in which he says " even for those things that don't flower, for everything flower, from within, or self blessing. But then it compares saint francis as a blessing in a way which i guess its a good thing to be compared to. so basically it seems to me this poem is about releasing that inner blessing.