Use, painters with a ‘s’ show there’s more than one. So it already presents a multi meaning.
OK! so some things you can do when you feel that way is to talk to someone about what or why you feel that way. Or you can get yourself in a good mood again by doing something you love or talking to someone you love. or if like you can stress-eat (it helps 50% of the time guaranteed!) or you can do something to get your mind off of your bad mood and play a game/videogame or watch tv and stuff like that. And what i got for you, this is what i did when i felt depressed! hope this helps!
Whenever repetition is used, it is used to bring attention to the main point, and to make it more memorable in the listener's minds. This makes you remember this phrase more, and makes you more likely to agree with it.
"Strewn feathers" are a metaphor for chaos. It can also be a bit of a paradox because feathers are lightweight, and chaos is a serious and heavy matter.
"Sang the heart upon its mantel" in the last stanza is personification.
"See", again in the last stanza, is a homophone, or a word whose pronunciation has double meaning. The poet could mean see as is sight, but also implying sea like the body of water.
