What is the role of quoting ancient poetry at the beginning?

1. "The edge of a sword comes from sharpening, and the fragrance of plum blossoms comes from the bitter cold." In order to succeed in anything, you must go through difficulties and obstacles. After experiencing that incident, I suddenly understood this truth. (The following is about writing about that incident) 2. “Only mother is good in the world, and a mother’s child is like a treasure.

"This song is well-known to every household, but how many people have really experienced it?