Why might a writer of creative nonfiction leave out some details, even though the details were part of the real experience?

Which quotation best expresses a major theme of this speech? "i saw my evil day at hand. the sun rose dim on us in theo morning, and at night is sunk in a dark cloud, and looked likea ball of fire.""i am much grieved, for i expected, if i did not defeat you, too hold out much longer, and give you more trouble before ! surrendered."m"we went to our great father. we were encouraged. hiso great council gave us fair words and big promises, but wegot no satisfaction.".**we told them to let us alone; but they followed on andbeset our paths, and they coiled themselves among us likethe snake."