Four short lines, and the whole poem turns on one odd phrase: "alive / While they still get to breathe." The speaker says she is among the lucky ones, but the luck is stranger than it first sounds. Being alive is treated as something to be thankful for, and the word "still" quietly suggests that breathing is not guaranteed. It could be taken away at any moment.
The poem doesn't say who "they" are, and that gap matters. Maybe they are people the speaker has lost, or maybe they are simply everyone, living on borrowed time. Either way, the speaker seems to feel gratitude mixed with unease. Her luck is measured against others who may not have it, which gives the thanks a shadow of guilt or awareness.
The mood is hushed and reflective. The dash after "ones" creates a small pause, as if she is catching her breath while saying it. It feels calm on the surface, but heavy underneath.