Whose Thirty-Year-Old Is Not Established?

Confucius said: "When I was fifteen, I was determined to learn; when I was thirty, I was established; when I was forty, I was not confused; when I was fifty, I knew the destiny; when I was sixty, my ears were obedient; when I was seventy, I followed my heart's desires without going beyond the rules." Confucius meant: "I determined to study at the age of fifteen. I will be able to achieve something at the age of thirty. I will no longer be confused when I encounter things at the age of forty. At the age of fifty, I will know which things cannot be controlled by human beings and be happy to know the destiny. At the age of sixty, I will be able to listen to various different opinions. At the age of seventy, I can do whatever I want without going beyond the rules. Continuing from the previous chapter, I am fifteen and determined to learn. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.