In the poem, blue skin represents a quality that people are afraid to share even though it is an important part of their identity.
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It means to get ahead of yourself.
It comes from a soliloquy in which Richard talks about his plans once Clarence and Edward are dead, but then he brings himself back to earth, saying 'I run before my horse to market', because they are both still alive and only when they are dead can he start counting his gains. It's a little like saying 'counting your chickens before they are hatched.'
Answer:
You read to find out the central idea the character or you learns
Explanation:
As you know theme is "broad idea or a message that is to be conveyed through a literary work." I think what would best work is you reading the book a couple of times and seeing what the central idea the character or you learned.
I hope this helped. I am sorry if you get this wrong.