“Pull down thy vanity” Reminds me of Satan who was cast down for vanity / pride.
The problem with the word modern is that it’s been in use for so long now that we can’t really use it now. Modern is old, time has moved on. This is and isn’t modern poetry. When, then ,does this exist?
“Here error is all in the not done” However, “When in doubt, do nothing” Tolstoy. Both are correct.