I believe that this poem uses natural elements to describe the human experience. We are existential. I always think of this quote "nothing is nothing. and everything is everything," because wether we have differences we are all the same in this world and the next.
So I kind of understood indirection to be sort of metaphorical speak or a way of writing a poem in which emotions are understood but not explicitly stated. I chose this poem because it seems to be using phrases like "When the city is rotting" and "Feathered language / Heavy as freedom" to convey emotion without explicitly stating what that emotion is.