This poem is an exercise in self-deception. By casually dismissing all of her losses, the speaker attempts to deal with their emotional aftermath. That she’s writing it in the first place, however shows just how disturbed she actually is by this extensive catalogue of loss. The last stanza packs the hardest punch – we discover that she’s lost a loved one – but she tries her darnedest to brush it off just like the other losses mentioned earlier, by claiming casually that this loss, too, is "no disaster" (1.3). In the end, though, we see that all these things are, in fact, personal disasters.
The poet actively seeks to deceive both herself and her readers in "One Art."