B.
Step-by-step explanation:
The above sentence shows that Hawthorne had a very intense attitude towards Isaac Newton. This line shows that he admired him deeply, because of his work and his relevance. That is why Hawthorne refers to Newton as someone who "left a fame behind that would be as bearable as if his name were written ... midnight sky."
This admiration also reveals what motivated Hawthorne to write a biography about Newton. So that people would understand your admiration for this great man.