I had learned.

"The old man and the sea" let me know that a person must have perseverance in order to succeed. The novel describes an old fisherman who is nearly sixty years old. When he goes fishing alone, he catches a big fish, but he can't pull it up. The old fisherman worked with the fish for several days before he found out that it was a big marlin several times more than his fishing boat. Although he knew it was difficult to win, he still didn't give up.
Later, because of the fishy smell on the wound of the marlin, several groups of sharks were attracted to snatch food, but the old man still didn't want to give up. Finally, he broke through the siege and brought the marlin back to the fishing port, which made other fishermen admire him