The line would appear to scan as with an extra unstressed syllable preceding the implied pause after "them?" (a pause, incidentally, that makes it hard to scan "...them? To die" as an foot, since the two unstressed syllables don't run together.) The use of opposing in context continues the metaphor of armed struggle begun by "take arms" in the previous line. There is potential ambiguity in the use of die here; obviously, it means "to lose one's life," but there are possible secondary meanings of "to pine for" and "vanish" as well. Sleep plays upon a double meaning of both "rest" and "being idle or oblivious."


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