Jacob Holmes-Brown at 2016-05-09 04:56:47:
I particularly respond to the line: "I may not complete this one, but I give myself to it." I think as human beings we have such a deep yearning need to be part of something larger and meaningful, and to be necessary, that to be able to commit to something wholly is our deepest goal.
In linking this back to writing or just fiction in general: we want to invest in characters and their journeys because they are people (in the best of literature/cinema) who are wholly committed to their destiny (or possibly tragically avoiding a higher calling) - their paths are lessons for our own.
It is also a lovely way to dive into a protagonist's POV - what does their innermost self long for?
And finally since you love Rilke (and I do too), here is another translation of the same poem. I really clicked with the book of translations by Edward Snow as they have something a little more mystical about them:
I live my life in widening circles
that drift out over the things.
I may not achieve the very last,
but it will be my aim.
I circle around God, around the age-old tower;
I've been circling for millennia
and still I don't know: am I a falcon, a storm,
or a sovereign song?