<span>O heavy lightness! serious vanity!
</span><span>O brawling love! O loving hate!
</span><span>Feather of lead, bright smoke, cold fire,
sick health!
Still-waking sleep,
All of the above are oxymorons. An oxymoron is simply something that is a contradiction to itself. Feathers are light, but here they call them lead which implies they are heavy. And when does love hate? Etc...
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Dont add comma is the right one
