Bowing one's head in the first paragraph means modesty.
What is the meaning of "bow your head" in the fourth line of the article-I haven't found it yet.
The function is to summarize the theme of this paragraph.
Franklin is listed to show that we should be modest. The purpose of listing young people is to show that they should have dignity and hold their heads high.
6. If you want to survive in society, you must put yourself in a correct position. Proverbs: bow your head and be a man.
I hope it helps you.