
A person called a hero takes vigorous action. This also applies to the pursuit of women.

To put in effort in a place where no one notices. Also, the act of serving others without being recognized by the world, or a person who embodies this.

The proverb "A sparrow does not produce a phoenix" means that great things do not arise from the ordinary. Specifically, it indicates that small birds like swallows and sparrows will not give birth to a beautiful mythical bird like the phoenix, imparting the lesson that the size and value of people or things are determined by their essence and nature.