The speaker feels herself being worn away by life—less a distinct self, more exposed to the sun’s relentless beat. She is fading into an “incomplete oblivion”: not fully alive, yet denied the clean finality of death, because someone who has not truly lived cannot properly die. There is a sense of being trapped in a middle state, exhausted by time but unable to rest.
The mood is restless and tense. Space snaps at her inexperienced eye, and time claws at her flesh. She is neither claimed by life nor released by death, so she must somehow gather the “burden of untasted breaths”—all the experiences she never got to have. The final line, “Who has not waked may not yet sleep,” captures the crux: without real awakening or fulfillment, peace remains out of reach.