What statements best describe how "mutability” reflects the idea in this excerpt?

So based on "A Defence of Poetry" by Shelly, in which Shelly suggests that emotions experienced in life are constantly changing, the lines from "Mutability" that can also be seen as a reflection of this idea would be these:"like forgotten lyres, whose dissonant strings / Give various response to each varying blast, / To whose frail frame no second motion brings / One mood or modulation like the last.”