Completely in agreement with you. good poetry (not to say, poetry) always leaves a trail of uncertainty with you or behind you. Ever since I first read it, I've liked the platonic "definition" of poetry that the great Jorge Luis Borges remembers: "that light, winged, sacred thing.
Thank you for your comment, 
RE: ADSactly Literature: Annotations or the Vigilant Consciousness of a Poetic (part II)