The reader is introduced to the marlin because Santiago sees one of the projecting sticks dip in the water (B).
In <em>The Old Man and the Sea</em>, the main character becomes aware of the presence of the marlin when he realizes something is tugging at his hundred-fathom-deep fishing line. Because of the strength of the bite, the stick to which the line is attached is pulled into the water. Santiago immediately recognizes the fish as being a large marlin.
Sometimes we underestimate ourselves, but in reality, sometimes we are the most essential thing. We are the difference of a million infinities, and completely going into oblivion.
Greek and Latin matter because it helps us with the pronunciation of words and the origin of words. When we know about where these words come from, how they are broken down (with suffixes and prefixes), and how each are pronounced, you better understand not only the word, but the meaning and the logic behind the word. This also aids in reading comprehension. Greek and Latin is key to understanding vocabulary, and a good vocabulary helps you to understand what you are reading.
I think it is talking about how the speaker feels about what is according during his life