What does "bust of pallas" means?

https://www.answers.com/Q/What_does_The_Bust_of_Pallas_symbolize

or

https://www.litcharts.com/lit/the-raven/symbols/pallas#:~:text=%E2%80%9CPallas%E2%80%9D%20refers%20to%20Pallas%20Athena%2C%20the%20Greek%20goddess,and%20his%20own%20rational%2C%20sane%20mind%20in%20particular.

Hope it helps =D

taking into account that a theme is the central topic a text treats and can be developed through a story, play, poem etc. the following are themes that can be further developed:  

my best friend jeffrey has many unusual interests. (the story could be about each of the unususal interests)

once a man gives his soul over to evil, he can never go back. (this could be a saying or a proverb)

the three sheepdogs lay around the yard all day. (it could be developed detailing how each of these sheepdogs lay around)

a priest's collar has an unusual effect upon people. (it could be developed detailing the different effect upon people)

innocence is a powerful force in a world full of corruption. (it could be developed detailing how is a world full of corruption)

king lear is a play shakespeare wrote later. (it is just a sentence and doesnt give any idea or topic to be discussed in details.

evil often wears the disguise of innocence. (this could be a saying or a proverb)