Answer: The state of being
Both poems deal with the theme of ideas in the air that are related to the conflicts between belief systems related to romanticism. More or less it is the idea of common sense between spiritual and while Ode to a nightingale focuses on this, A slant of light speaks of oppression that's in the air and a fleeting sense of spiritual.
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here's your answer but u can add some more words in it or u can remove some words
It is C/3rd in row because thou meaning you, shalt meaning shall, and pangs meaning pain.